--- aliases: - Operation Paperclip - Paperclip category: Intelligence Operation created: 2026-05-14 end: 1959-01-01 location: United States start: 1945-09-01 summary: Operation Paperclip was the postwar U.S. program that recruited over 1,600 German and Austrian scientists from the defeated Third Reich, falsifying Nazi party records to enable their employment, with key recruits Wernher von Braun and Arthur Rudolph later directing major NASA programs. tags: - Program - CIA - USA - Germany - WWII - Nazi - Science - ColdWar - 1940s - 1950s title: Operation Paperclip updated: 2026-05-17 --- Operation Paperclip was a classified U.S. government program that systematically recruited German and Austrian scientists, engineers, physicians, and technical specialists from the defeated Third Reich beginning in the summer and fall of 1945. Operated by the Joint Intelligence Objectives Agency (JIOA), which reported to the [Joint Chiefs of Staff](/organizations/joint-chiefs-of-staff/) and worked closely with the [OSS](/organizations/office-of-strategic-services/) and later the [CIA](/organizations/central-intelligence-agency/), the program brought over 1,600 technical specialists to the United States to work for American military, intelligence, and civilian agencies during the critical period of the emerging [Cold War](/concepts/cold-war/) and the American aerospace and weapons development programs.[^1] ### Origins and the German Science Race The program emerged from recognition, in the final stages of [World War II](/events/world-war-ii/), that [Germany](/places/germany/) had developed technical capabilities - particularly in rocketry, jet propulsion, nerve agent chemistry, high-altitude medicine, and aeronautical engineering - that the United States had not matched. The V-2 ballistic missile program, developed at Peenemünde under [Wernher von Braun](/people/wernher-von-braun/) and Walter Dornberger, represented a class of military technology that would define the postwar competition with the Soviet Union. American forces operating under Operation Alsos raced German-held scientific facilities and personnel ahead of Soviet forces in the war's final weeks. The Soviets simultaneously conducted their own recruitment of German technical talent through Operation Osoaviakhim. The postwar division of Germany meant that both superpowers secured German expertise but that the competition produced parallel rocket and weapons programs in each country.[^1] ### Authorization and the Nazi Problem President [Truman](/people/harry-s-truman/)'s initial directive specifically prohibited the recruitment of "ardent Nazis." In practice, the JIOA systematically circumvented this prohibition: the records and backgrounds of scientists with disqualifying Nazi party membership, SS membership, or wartime conduct were altered before they were reviewed by the State Department and other agencies for security clearances. This process - which amounted to the systematic falsification of government records - was documented in Annie Jacobsen's 2014 investigation and in declassified JIOA files. Von Braun, who was an SS officer and member of the Nazi party, had his records altered to enable his employment. Arthur Rudolph, who had used slave labor from the Mittelbau-Dora concentration camp in V-2 production - where approximately 20,000 prisoners died - was recruited and later directed the Saturn V rocket program for [NASA](/organizations/nasa/) before his Nazi-era conduct was investigated in the 1980s and he agreed to renounce U.S. citizenship and return to Germany. Hubertus Strughold, the Luftwaffe aviation medicine physician who became "the father of U.S. space medicine," had participated in or overseen human experiments at the Dachau concentration camp; his records were altered before his recruitment.[^1] ### Key Personnel Von Braun was the most prominent Paperclip recruit. An SS officer and the technical director of the V-2 program, he was brought to Fort Bliss, Texas, along with approximately 100 German rocket engineers in 1945, and eventually directed the Marshall Space Flight Center and led the development of the Saturn V rocket that carried the Apollo program to the moon. His wartime record, including his use of slave labor, was publicly documented during his lifetime but did not prevent his celebrated American career. Walter Dornberger, who had commanded the Peenemünde facility, was also recruited, eventually working for Bell Aircraft on space plane concepts. Arthur Rudolph, who had managed V-2 production at Mittelwerk using Mittelbau-Dora camp labor, directed the Pershing missile and Saturn V programs before his wartime record was investigated by the [Justice Department](/organizations/department-of-justice/)'s Office of Special Investigations in 1984; he renounced citizenship and departed rather than face proceedings.[^1] In 1945, before the program was fully formalized, [H.S. Tsien](/people/qian-xuesen/) - the Chinese-American aerospace scientist who co-founded the Jet Propulsion Laboratory - was sent to Germany by the U.S. Army Air Forces on missions to interrogate captured German aerospace scientists, including von Braun and Peenemünde aerodynamicists, as part of the broader assessment of German technical capabilities.[^1] ### Nazi Doctors and the CIA Behavioral Programs Beyond the aerospace recruits, Paperclip transferred Nazi medical expertise that fed directly into the CIA's behavioral-control work. Kurt Blome, the Reich's deputy surgeon general and director of its biological-weapons program (including weaponized plague), was acquitted at the Nuremberg Doctors' Trial in August 1947 and within two months was consulting U.S. Army biological-warfare researchers in Maryland. Walter Schreiber, the Reich surgeon general who had assigned concentration-camp prisoners to experimental doctors, was given a post at the Air Force School of Medicine at Randolph Field, Texas. Kurt Plotner had conducted mescaline experiments on prisoners at [Dachau](/places/dachau/) for the SS in search of a truth drug, work of direct interest to the CIA's postwar truth-drug research. [Camp King](/places/camp-king/), the clandestine CIA-Army interrogation center in occupied Germany, served as the operational hub where this knowledge was applied; Schreiber and then Blome served as its chief medical officer, and the interrogation techniques developed there fed into [ARTICHOKE](/programs/project-bluebird-and-project-artichoke/) and the [MKULTRA](/programs/project-mkultra/) programs. The chemist Friedrich "Fritz" Hoffmann, who had synthesized poison gases for the Luftwaffe, was likewise brought over.[^3] ### Legacy and Controversy The German scientists brought through Paperclip made foundational contributions to the U.S. space program, missile development, aviation medicine, and chemical and biological research. Their technical contributions were real and in some cases irreplaceable. The ethical dimensions of the program - the employment of individuals with serious Nazi records, the systematic falsification of government records to circumvent legal prohibitions, and the implicit decision that American competitive advantage in the Cold War took priority over accountability for wartime crimes - remained subjects of historical and moral assessment. The Soviet Union's parallel program produced the Soviet space and missile programs that competed directly with American programs developed from German expertise, creating a Cold War technological competition shaped on both sides by the same cohort of German scientists.[^2] [^1]: Jacobsen, Annie. *Operation Paperclip: The Secret Intelligence Program That Brought Nazi Scientists to America.* Little, Brown and Company, 2014 (the primary English-language investigation, based on declassified JIOA files and other government records). Hunt, Linda. *Secret Agenda: The United States Government, Nazi Scientists, and Project Paperclip, 1945 to 1990.* St. Martin's Press, 1991. [^2]: Lasby, Clarence G. *Project Paperclip: German Scientists and the Cold War.* Atheneum, 1971. [^3]: Annie Jacobsen, *Operation Paperclip*. Little, Brown, 2014; "What Cold War CIA Interrogators Learned from the Nazis," *The Daily Beast*, 2014; Curt Rowlett, "Project Mind Kontrol," *Steamshovel Press* #16, 1998.