On May 22, 1945 — fourteen days after Germany's unconditional surrender — a thirty-three-year-old SS officer named Wernher von Braun sat in a military hospital in Reutte, Austria, his left arm in a cast from a car accident weeks earlier, and waited for the Americans to decide what to do with him. Von Braun had surrendered voluntarily, along with his brother Magnus and several hundred members of his rocket engineering team, choosing the Americans over the Soviets with the deliberate calculation of a man who understood that his skills were his only currency. He was right. Within months, von Braun and 118 of his colleagues were on their way to the United States under a program so secret that the President of the United States did not know the full truth about the men he had authorized to enter the country.
The program was called Operation Paperclip. It would bring over 1,600 German scientists, engineers, and technicians to America between 1945 and 1959. It would violate direct presidential orders. It would require the systematic falsification of government records. It would grant new lives and distinguished careers to men who had participated in — or directly supervised — some of the worst atrocities of the twentieth century. And it would lay the technological foundation for American dominance in rocketry, aerospace, chemical and biological weapons, and space exploration for the next eight decades. Operation Paperclip is the skeleton in the closet of modern American science — the place where the Cold War's moral logic was tested to destruction and the national security state learned that it could do whatever it judged necessary, regardless of law, presidential authority, or the weight of the dead.
In the winter of 1944-45, as Allied forces closed on Germany from west and east, it became clear to the intelligence services of every major power that the Third Reich's most valuable assets were not its territory, its gold reserves, or its depleted military divisions. They were its scientists. Nazi Germany had invested massively in weapons research throughout the war, and while much of it had come too late to change the outcome — jet aircraft, guided missiles, nerve agents, submarine technology — the knowledge itself was staggering in scope and, in several domains, years ahead of anything the Allies possessed.
The V-2 rocket was the most dramatic example. Developed at the Peenemunde Army Research Center on the Baltic coast under the direction of von Braun and the military oversight of Major General Walter Dornberger, the V-2 was the world's first long-range guided ballistic missile and the first human-made object to reach the boundary of space. It could carry a one-ton warhead over 200 miles at speeds exceeding 3,500 miles per hour — faster than the speed of sound, meaning it arrived before its targets could hear it coming. Between September 1944 and March 1945, over 3,000 V-2s were launched against London, Antwerp, and other Allied targets, killing an estimated 9,000 people. The rocket was inaccurate, unreliable, and strategically futile — it could not reverse the tide of the war. But it was a technological achievement that no other nation on Earth could match. The V-2 represented, in concrete and terrifying form, the future of warfare. And everyone wanted it.
The Americans moved first. In late 1944, the Combined Intelligence Objectives Subcommittee (CIOS) — a joint Anglo-American body — began identifying German scientists and technical facilities for exploitation. By early 1945, specialized teams were operating in the field. The most important was the U.S. Army Ordnance Corps' "Special Mission V-2," later absorbed into the broader Operation Overcast, which was the precursor to Paperclip. Colonel Holger Toftoy, chief of the Army's rocket branch, dispatched Major Robert Staver to locate and secure V-2 hardware, documentation, and — above all — the men who had built it.
The Soviets were doing the same thing. The Red Army had its own teams of intelligence officers and scientists sweeping through eastern Germany, and they were equally aware of what was at stake. The race was literal. When American troops reached the Mittelwerk — the underground factory complex in the Harz Mountains where V-2 rockets had been mass-produced — they had only weeks before the region was scheduled to be handed over to Soviet control under the agreed-upon occupation zones. Working around the clock, American soldiers loaded 341 railcars with V-2 components, technical documents, and manufacturing equipment and shipped them west before the Soviets arrived. It was the largest seizure of enemy war material in history.
But the hardware was useless without the men who understood it. Von Braun knew this. In the final chaotic weeks of the war, he had organized the evacuation of his team from Peenemunde — ahead of the advancing Red Army — and moved them south into the Bavarian Alps, carrying with them fourteen tons of technical documents that they buried in an abandoned mine shaft near the town of Dorten. When American forces arrived in the area, von Braun sent his brother Magnus on a bicycle to find them. Magnus approached Private First Class Fred Schneikert of the 44th Infantry Division and said, in English: "My name is Magnus von Braun. My brother invented the V-2. We want to surrender."
The surrender was accepted. The documents were recovered. And within weeks, the process of transforming Nazi weapons engineers into American defense assets was underway.
President Harry Truman authorized the program on September 3, 1946, signing a directive that permitted the Joint Intelligence Objectives Agency (JIOA) — a body created within the Joint Chiefs of Staff specifically for this purpose — to bring German and Austrian scientists to the United States for employment in military research. The directive came with an explicit restriction: no one who had been "a member of the Nazi Party, and more than a nominal participant in its activities, or an active supporter of Nazi militarism" was eligible.
The restriction was ignored almost immediately, because following it would have disqualified most of the scientists the military wanted. Membership in the Nazi Party, the SA, or the SS was not incidental for German scientists working on weapons programs during the Third Reich. It was, in many cases, a precondition for employment, advancement, and access to resources. Von Braun himself had joined the Nazi Party in 1937 and the SS in 1940, eventually reaching the rank of Sturmbannfuhrer — equivalent to major. He later claimed that both memberships were coerced, that he had joined the Party under pressure from his superiors and the SS at the personal insistence of Heinrich Himmler. The claim is disputed. What is not disputed is that von Braun held these memberships, wore the SS uniform, attended SS functions, and worked on a weapons program that was a top priority of the Nazi war machine.
The JIOA's solution was simple and systematic: it rewrote the files. When a scientist's security evaluation came back from the military's background investigators with findings that would disqualify him under Truman's directive, JIOA officers attached a paperclip to the original dossier — hence the program's name — and replaced it with a sanitized version. Nazi Party memberships were omitted. SS ranks were downplayed or deleted. Allegations of war crimes were characterized as unsubstantiated. In case after case, the documentary record was altered to transform men who were, by any honest assessment, active participants in the Nazi regime into politically harmless technicians who had merely worked in Germany during the war.
This was not a marginal practice. It was standard operating procedure. A 1985 investigation by the U.S. Department of Justice's Office of Special Investigations confirmed that the JIOA had systematically circumvented Truman's directive, that military intelligence had knowingly submitted false information to immigration and security officials, and that the State Department — which was supposed to provide an independent check on the scientists' backgrounds — had been deliberately kept in the dark about the true nature of many recruits' wartime activities.
The paperclip on the dossier became the symbol of a program that chose strategic advantage over moral accountability — and, in doing so, established a precedent that would echo through the entire subsequent history of the American national security state: when secrecy and strategy conflict with law and principle, secrecy wins.
The scale of Operation Paperclip and its successor programs is difficult to grasp without examining individual cases, because the aggregate numbers — 1,600 scientists, dozens of programs, hundreds of classified projects — obscure the specific moral compromises that were made for each man who was admitted.
Wernher von Braun is the most famous and the most morally complex. His brilliance as a rocket engineer is beyond dispute — he is, more than any other individual, the father of the American space program. After arriving in the United States in 1945, he led the Army's rocket program at Fort Bliss, Texas, and then at the Redstone Arsenal in Huntsville, Alabama, where he developed the Redstone missile, the Jupiter-C rocket (which launched America's first satellite, Explorer 1, in 1958), and ultimately the Saturn V — the most powerful rocket ever built, which carried every Apollo mission to the Moon. He became a celebrity, appeared on the cover of Time magazine, collaborated with Walt Disney on television programs about space exploration, and was awarded the National Medal of Science by President Gerald Ford in 1977.
But the V-2, von Braun's masterwork, was built by slaves. The Mittelwerk factory where V-2 rockets were assembled was staffed by prisoners from the Mittelbau-Dora concentration camp — a subcamp of Buchenwald. Conditions at Dora were among the worst in the entire concentration camp system. Prisoners worked twelve-hour shifts in underground tunnels carved into the Harz Mountains, breathing toxic fumes from rocket fuel and industrial chemicals, sleeping in the tunnels on wooden bunks stacked four high, with no ventilation, no sanitation, and almost no food. An estimated 20,000 prisoners died at Mittelbau-Dora — more people than were killed by the V-2 rockets the factory produced. They died of starvation, disease, exhaustion, and deliberate murder. Prisoners who were too weak to work were hanged from cranes on the factory floor as a warning to others. SS guards beat prisoners to death for minor infractions. The death rate was so high that the camp required a dedicated crematorium.
Von Braun visited the Mittelwerk regularly. He has been placed at the factory by multiple eyewitnesses, including surviving prisoners. The question of what he knew — and what he chose not to see — has been debated for decades. At minimum, he knew that his rockets were being built by concentration camp labor. Former prisoners testified that they saw von Braun in the tunnels. One survivor, Guy Morand, stated that he witnessed von Braun personally select prisoners from the Buchenwald camp for transfer to Dora. Adam Cabala, another survivor, testified that von Braun watched as prisoners were punished. Von Braun himself acknowledged visiting the factory but denied witnessing atrocities and denied having the authority to change conditions. His defenders argue that he was a scientist, not an SS administrator, and that challenging the labor system would have meant his own imprisonment or death. His critics argue that he was a willing participant in a system that consumed human beings as raw material for his ambitions.
The American government knew all of this when it brought von Braun to the United States. It chose to look away. The Moon was more important than the dead at Dora.
Hubertus Strughold was a physiologist who became known as the "Father of Space Medicine" for his pioneering work on the effects of high altitude, acceleration, and weightlessness on the human body. He established the Department of Space Medicine at the U.S. Air Force School of Aviation Medicine at Randolph Field, Texas, and his research was foundational to the development of life-support systems for military and civilian aviation and, later, for manned spaceflight. NASA named a library after him. The Aerospace Medical Association created an award in his honor.
Strughold had been the director of the Aviation Medical Research Institute of the Reich Air Ministry in Berlin. In that capacity, he was involved in — or, at minimum, fully informed about — the infamous Dachau experiments. At the Dachau concentration camp, Nazi doctors conducted experiments on prisoners to determine the effects of extreme altitude and extreme cold on the human body. In the high-altitude experiments, prisoners were placed in low-pressure chambers and subjected to conditions simulating altitudes up to 68,000 feet. Many died. In the freezing experiments, prisoners were immersed in ice water or left naked outdoors in winter until they lost consciousness or died. The results were meticulously recorded. Strughold attended a 1942 conference in Nuremberg where the results of the Dachau freezing experiments were presented; the minutes of the conference, which survive, show his name on the attendance list. He later denied knowledge of the experiments, a denial that became increasingly untenable as documents were declassified. In 2006, the Aerospace Medical Association retired the Strughold Award. NASA quietly removed his name from its library.
Kurt Blome was the deputy surgeon general of the Third Reich and the director of Germany's biological weapons program. He conducted plague experiments on concentration camp prisoners. He was charged at the Nuremberg Doctors' Trial in 1947. He was acquitted — in a verdict that historians have attributed in part to American intervention, motivated by the desire to access his expertise in bioweapons research. After his acquittal, Blome was hired by the U.S. Army Chemical Corps and worked at Camp King, a military intelligence facility in Oberursel, Germany. He later worked for the Chemical Corps at its headquarters in Edgewood, Maryland. The man who had tested plague on concentration camp inmates was put to work developing America's own biological weapons capability.
Arthur Rudolph was the production manager of the Mittelwerk V-2 factory — the man directly responsible for overseeing the slave labor force at Mittelbau-Dora. After arriving in the United States, Rudolph had a long and distinguished career at NASA, culminating in his role as project director for the Saturn V rocket. He received the NASA Distinguished Service Medal. In 1984, when the Office of Special Investigations finally investigated his wartime activities, Rudolph agreed to renounce his American citizenship and leave the country rather than face denaturalization proceedings. He returned to Germany. He was never prosecuted. The Saturn V had already reached the Moon.
Walter Schreiber was the former Surgeon General of the Third Reich. He had overseen the medical experimentation programs of the German military, including experiments on concentration camp prisoners involving typhus, malaria, and epidemic jaundice. He was brought to the United States and given a position at the Air Force School of Aviation Medicine in Texas. When the journalist Drew Pearson exposed Schreiber's background in his syndicated column in 1952, the resulting public outcry forced the government to relocate Schreiber to Argentina — not to face justice, but to escape embarrassment.
These are not fringe cases. They are representative of the program. The pattern is consistent: men with documented involvement in atrocities were admitted, their records were falsified, they were given positions of authority in the American military-industrial complex, and when their pasts occasionally surfaced, the institutional response was not accountability but concealment, relocation, or quiet retirement.
The moral center of the Paperclip story is not in the offices of the JIOA or the laboratories of Huntsville. It is underground, in the Harz Mountains of central Germany, in the tunnels of the Mittelwerk.
By late 1943, Allied bombing had made surface production of V-2 rockets impossible. Albert Speer, the Reich Minister of Armaments, and SS General Hans Kammler ordered the conversion of an existing underground tunnel complex near the town of Nordhausen into a massive factory for V-2 production. The labor was provided by prisoners from the newly established Mittelbau-Dora concentration camp. The tunnels — originally excavated for an underground fuel depot — ran more than a mile into the mountain, and the prisoners were tasked with expanding them, installing production lines, and eventually assembling the rockets themselves.
The first months were the worst. Before the living quarters were completed, prisoners slept in the tunnels on the bare rock floor, breathing dust from the ongoing excavation, with no access to daylight, fresh air, or adequate water. Dysentery was universal. Tuberculosis spread unchecked. The noise from construction was constant and deafening. Prisoners who collapsed were beaten or killed. The dead were stacked at the tunnel entrances for collection. By the time the facility was operational in early 1944, thousands had already died from the construction phase alone.
Once production began, conditions improved only marginally. The factory operated around the clock in two twelve-hour shifts. Prisoners assembled V-2 components alongside German civilian technicians and engineers — the same engineers who would later be recruited by Paperclip. The proximity was not incidental. The engineers knew exactly who was building their rockets. They worked alongside prisoners who were starving, diseased, and routinely brutalized by SS guards. They saw the hangings on the factory floor. They smelled the crematorium. And they continued to work.
An estimated 60,000 prisoners passed through the Mittelbau-Dora camp system. Approximately 20,000 of them died — a death rate of roughly one in three. By comparison, approximately 5,000 people were killed by the V-2 rockets that the factory produced. The weapon killed fewer people than its own manufacture. This is the fact that haunts the Paperclip legacy: the United States imported the men who ran a factory where the production process was deadlier than the product.
The first group of Paperclip scientists — 118 men from von Braun's Peenemunde team — arrived at Fort Bliss, Texas, in late 1945 under the original program name, Operation Overcast. (The name was changed to Paperclip in March 1946 after the Overcast designation was accidentally compromised.) They were technically "wards of the Army" — not immigrants, not prisoners, not employees in any conventional sense. Their legal status was deliberately ambiguous. They had entered the country outside normal immigration channels, their presence was classified, and their families remained in Germany as what amounted to leverage ensuring their continued cooperation.
At Fort Bliss, the German team worked on reassembling and testing captured V-2 rockets at the White Sands Proving Ground in New Mexico. Between 1946 and 1952, sixty-seven V-2s were launched from White Sands — the first large-scale rocket tests conducted in the United States and the foundation of America's ballistic missile program. The irony was total: rockets that had been built to destroy London were now being launched into the New Mexico desert by the same men who had designed them, wearing civilian clothes instead of SS uniforms, employed by the same government whose soldiers had liberated the camps where the rockets had been assembled.
In 1950, the Army transferred von Braun and his core team to the Redstone Arsenal in Huntsville, Alabama, which became the center of American rocketry for the next two decades. It was at Huntsville that von Braun developed the Redstone missile — America's first operational ballistic missile — and its successors. The Jupiter-C rocket, a modified Redstone, launched America's first satellite in January 1958, four months after the Soviet Union's Sputnik had humiliated the American scientific establishment and triggered the Space Race. The message was not lost on the military or the public: America was behind the Soviets, and the man who could close the gap was a former Nazi.
In 1960, von Braun and his team were transferred from the Army to the newly created National Aeronautics and Space Administration. Von Braun was appointed director of NASA's Marshall Space Flight Center in Huntsville, where he led the development of the Saturn family of rockets. The Saturn V — 363 feet tall, generating 7.5 million pounds of thrust at liftoff, capable of delivering 130 tons to low Earth orbit — remains the most powerful operational launch vehicle ever built. It launched every Apollo Moon mission, every Skylab component, and carried the weight of American prestige during the most visible technological competition of the Cold War.
On July 16, 1969, when Saturn V lifted Apollo 11 from Pad 39A at Kennedy Space Center, Wernher von Braun watched from the firing room. Four days later, Neil Armstrong walked on the Moon. The rocket that made it possible had been conceived in the mind of a man who had joined the SS, built weapons with slave labor, and been delivered to America by an intelligence program that falsified his records to make him admissible. The Moon landing is the triumph of Paperclip. It is also its most troubling monument.
The aerospace scientists are the most visible Paperclip legacy, but they were not the only — or necessarily the most consequential — recruitment stream. A parallel program brought German specialists in chemical and biological weapons into the American military establishment, with consequences that are less celebrated and, in some respects, more disturbing.
Fort Detrick, the U.S. Army's biological weapons research center in Frederick, Maryland, became a primary destination for Paperclip scientists with expertise in germ warfare, toxicology, and the weaponization of disease agents. The knowledge these men brought was not theoretical. It came from programs that had tested biological agents on human beings — concentration camp prisoners who had no ability to consent, resist, or survive. When the U.S. Army hired Kurt Blome, it was hiring a man who had tried to weaponize plague, tested it on prisoners, and been acquitted at Nuremberg with American help. When it employed Walter Schreiber, it was employing the man who had overseen the entire medical experimentation apparatus of the Wehrmacht.
The Army Chemical Corps at Edgewood Arsenal, Maryland, was another key recipient. German scientists with expertise in nerve agents — tabun, sarin, and soman, all developed by Nazi chemists — were brought in to advance the American chemical weapons program. The United States had no nerve agent capability before the war. By the 1950s, largely thanks to Paperclip recruits and captured German stockpiles, it had a mature program. The nerve agent VX, developed by British and American chemists in the 1950s, was an extension of the German work.
The biological and chemical weapons pipeline is less documented than the aerospace pipeline, in part because many of the relevant records remain classified and in part because the moral dimensions are even more uncomfortable. Von Braun can be narrativized as a conflicted genius who built rockets for whoever would let him — "I aimed for the stars," he famously said, prompting the satirist Mort Sahl to add, "and hit London." The bioweapons scientists cannot be narrativized at all. They were men who had experimented on helpless human beings, and the United States government hired them to continue the work.
The most direct and disturbing legacy of Paperclip runs through the CIA's mind control programs. The connection is not speculative. It is documented in the Agency's own files, in congressional testimony, and in the work of historians who have traced the institutional lineage from Nazi interrogation research to the American programs that followed.
At Dachau, SS doctor Kurt Plotner conducted experiments using mescaline as an interrogation tool. Prisoners were given the drug without their knowledge and then questioned under its influence to determine whether it could be used as a "truth serum." The experiments were crude and the results inconclusive, but they produced data — data that was captured by American intelligence teams and incorporated into the earliest U.S. interrogation research programs.
The institutional pathway ran through Camp King in Oberursel, Germany, a military intelligence facility that served as both an interrogation center and a research site. Camp King employed several Paperclip scientists and was the location where American intelligence officers first began experimenting with psychoactive drugs as interrogation aids, building directly on the Dachau work. The knowledge and techniques developed at Camp King fed into Operation Bluebird (1950), then Operation Artichoke (1951), and finally MKUltra (1953) — the CIA's sprawling, twenty-year program of mind control research that involved the administration of LSD and other drugs to unwitting subjects, the use of hypnosis and sensory deprivation, and the investigation of whether a human being could be programmed to kill.
The CIA did not merely inherit Nazi data. It inherited the Nazi willingness to experiment on human beings without consent. The moral barrier that should have prevented an American intelligence agency from drugging its own citizens had already been crossed — in principle — the moment the government decided that the Nazi scientists' knowledge was more valuable than accountability for how that knowledge had been obtained. Paperclip did not cause MKUltra. But it created the institutional conditions — the secrecy infrastructure, the moral precedent, the cultural habit of treating human beings as experimental material in the name of national security — that made MKUltra possible.
As the 1977 Senate hearings on MKUltra revealed, the CIA's program had reproduced, in almost every particular, the methods that the United States had condemned at Nuremberg. Unwitting subjects. Non-consensual experimentation. Drugs administered without knowledge. Psychological torture. The destruction of records to conceal what had been done. The only difference was the flag on the building.
The United States was not the only power to exploit German scientific talent. The Soviet Union ran its own recruitment and abduction programs, and the competition between the two powers for German scientists was one of the earliest and most concrete manifestations of the Cold War.
The Soviets were more direct. While the Americans relied on inducements — employment, housing, the promise of a new life in the United States — the Soviets used coercion. In October 1946, in what became known as Operation Osoaviakhim, Soviet forces conducted a mass seizure of German scientists and engineers from the Soviet occupation zone. In a single night, approximately 2,200 German specialists and their families — an estimated 6,000 people total — were rounded up and transported to the Soviet Union. Many had been working voluntarily for the Soviets; others were taken by force. They were put to work in closed research cities — the same system of secret scientific facilities that would produce the Soviet nuclear bomb, the intercontinental ballistic missile, and the Sputnik satellite.
The scientists who went to the Soviets included several who had been passed over by or had eluded the Americans. Helmut Grottrup, a senior guidance specialist from the Peenemunde team, worked in the Soviet Union for several years before being allowed to return to Germany. His contributions to the early Soviet missile program, while significant, were less decisive than von Braun's contributions to the American program — in part because the Soviet chief designer, Sergei Korolev, was himself a brilliant rocket engineer who did not need German help as much as his American counterparts needed it.
The Soviet parallel matters because it was the justification that Paperclip's architects used at every turn. When confronted with the moral objections — from the State Department, from journalists, from the rare government official who cared about the program's implications — the JIOA's answer was always the same: if we don't take them, the Soviets will. The argument was effective because it was true. The Soviets were, in fact, taking every German scientist they could get. The question Paperclip posed — and which has never been satisfactorily answered — is whether the Cold War's strategic logic justified the moral cost, or whether the moral cost was itself a strategic wound, an act of self-corruption that compromised the values the Cold War was supposedly being fought to defend.
Operation Paperclip was not officially acknowledged by the U.S. government until decades after the fact, and the full scope of the program has never been subject to a comprehensive public reckoning.
The first significant public exposure came in 1985, when the Department of Justice's Office of Special Investigations — created in 1979 to identify and deport Nazi war criminals living in the United States — began examining the wartime records of Paperclip recruits. The investigation led to the denaturalization and departure of Arthur Rudolph and identified several other scientists whose records had been falsified. But the investigations were limited in scope, focused on immigration fraud rather than on the larger institutional decisions that had created the program. No senior American official was ever held accountable for authorizing the falsification of records, for circumventing the President's directive, or for knowingly importing men who had participated in atrocities.
In 2006, the National Archives released approximately 35,000 pages of previously classified Paperclip records under the Nazi War Crimes Disclosure Act of 1998. The documents confirmed much of what historians had already established: that the program was larger than previously acknowledged, that the record falsification was systematic, and that American officials had been aware of the recruits' backgrounds from the beginning. The release generated media coverage but no official inquiry.
Annie Jacobsen's 2014 book Operation Paperclip: The Secret Intelligence Program That Brought Nazi Scientists to America provided the most comprehensive public account, drawing on declassified files, personal papers, and interviews to reconstruct the program in forensic detail. Jacobsen documented not only the well-known cases — von Braun, Strughold, Rudolph — but dozens of lesser-known scientists whose wartime activities were equally troubling and whose American careers were equally distinguished. The book was widely reviewed and commercially successful. It changed nothing in terms of institutional accountability.
The absence of a reckoning is itself part of the Paperclip legacy. The program demonstrated that the national security state could make moral compromises of extraordinary magnitude — importing war criminals, falsifying records, deceiving the President — and face no consequences. The lesson was not lost on the institutions that learned it. The same logic — strategic necessity overrides moral constraint, secrecy protects the decision-makers from accountability, the public cannot be trusted with the truth — would recur in MKUltra, in the CIA's alliance with drug traffickers, in the Iran-Contra affair, in the post-9/11 torture programs, and in every subsequent instance where the permanent national security bureaucracy decided that what it was doing was too important to be subject to democratic oversight.
Operation Paperclip did not merely import scientists. It imported a way of thinking — a framework in which knowledge, however obtained, is morally neutral; in which the ends of national security justify any means; and in which the classification system exists not to protect legitimate secrets but to insulate the decision-makers from the consequences of their decisions. That framework is the deepest and most durable product of the program. The rockets fly. The records are sealed. The dead at Dora have no monument in Huntsville. And the paperclip on the dossier — that small, bureaucratic instrument that held the false file to the real one — became the symbol of a nation that chose power over principle and never looked back.