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Operation Paperclip

Secret post-WWII United States program

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A briefing is given by Major Rocco Petrone (off camera) to President John F. Kennedy during a tour of Blockhouse 34 at the Cape Canaveral Missile Test Annex. Also seen are NASA administrator James Web
NASA/photographer unknown · Public domain

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Through Nazi Germany, Soviet Union and Patent

The effort began in earnest in 1945, as the Allies advanced into Germany and discovered a wealth of scientific talent and advanced research that had contributed to Germany's wartime technological advancements. The US Joint Chiefs of Staff officially established Operation Overcast (operations "Overcast" and "Paperclip" were related, and the terms are often used interchangeably) on July 20, 1945, with the dual aims of leveraging German expertise for the ongoing war effort against Japan and to bolster US postwar military research. The operation, conducted by the Joint Intelligence Objectives Agency (JIOA), was largely actioned by special agents of the US Army's Counterintelligence Corps (CIC). Many selected scientists were involved in the Nazi rocket program, aviation, or chemical/biological warfare. The Soviet Union in the following year conducted a similar program, called Operation Osoaviakhim, that emphasized many of the same fields of research.

The operation, characterized by the recruitment of German specialists and their families, relocated more than 1500 experts to the US. It has been valued at $10 billion USD in patents and industrial processes. Recruits included such notable figures as Wernher von Braun, a leading rocket-technology scientist. Those recruited were instrumental in the development of the US space program and military technology during the Cold War. Despite its contributions to American scientific advances, Operation Paperclip has been controversial because of the Nazi affiliations of many recruits, and the ethics of assimilating individuals associated with war crimes into American society.

The operation was not solely focused on rocketry; it also transferred expertise in aerodynamics, aviation medicine, and related military research. Its technological legacy was especially visible in the transformation of German V-2 rocket technology into later American missile and launch systems. After moving to Redstone Arsenal in 1950, Wernher von Braun’s team developed the Redstone and Jupiter missiles. When this group was transferred to the National Aeronautics and Space Administration (NASA) in 1960, it became central to the work of the Marshall Space Flight Center and the development of the Saturn launch vehicles used in the Apollo program. The related Mercury-Redstone rocket also carried Alan Shepard on the first American human spaceflight.

In aeronautics, German high-speed flight research and aerodynamic knowledge contributed to postwar American aircraft and missile development. In aviation medicine, German specialists contributed to early space medicine research in the United States, including studies on weightlessness, life-support systems, and human performance in extreme conditions.

Operation Paperclip was part of a broader strategy by the US to harness German scientific talent in the face of emerging Cold War tensions, and ensure this expertise did not fall into the hands of the Soviet Union or other nations. The operation's legacy has remained controversial in subsequent decades.

Background and Operation Overcast

In February 1945, Supreme Headquarters Allied Expeditionary Force (SHAEF) set up T-Force, or Special Sections Subdivision, which grew to over 2,000 personnel by June. T-Force examined 5,000 German targets, seeking expertise in synthetic rubber and oil catalysts, new designs in armored equipment, V-2 (rocket) weapons, jet and rocket propelled aircraft, naval equipment, field radios, secret writing chemicals, aero medicine research, gliders, and "scientific and industrial personalities".

When large numbers of German scientists began to be discovered by the advancing Allied forces in late April 1945, the Special Sections Subdivision set up the Enemy Personnel Exploitation Section to manage and interrogate them. The Enemy Personnel Exploitation Section established a detention center, Camp Dustbin, first near Paris and later in Kransberg Castle outside Frankfurt. The US Joint Chiefs of Staff (JCS) established the first secret recruitment program, called Operation Overcast, on July 20, 1945, initially "to assist in shortening the Japanese war and to aid our postwar military research". The term "Overcast" was the name first given by the German scientists' family members for the housing camp where they were held in Bavaria. In late summer 1945, the JCS established the JIOA, a subcommittee of the Joint Intelligence Community, to directly oversee Operation Overcast and later Operation Paperclip. The JIOA representatives included the army's director of intelligence, the chief of naval intelligence, the assistant chief of Air Staff-2 (air force intelligence), and a representative from the State Department. In November 1945, Operation Overcast was renamed Operation Paperclip by Ordnance Corps officers, who would attach a paperclip to the folders of those rocket experts whom they wished to employ in the United States.

The project was not initially targeted against the Soviet Union; rather the concern was that German scientists might emigrate and continue their research in countries that remained neutral during the war. Much US effort was focused on Saxony and Thuringia, which on July 1, 1945, became part of the Soviet occupation zone. Many German research facilities and personnel had been evacuated to these states before the end of the war, particularly from the Berlin area. The USSR then relocated more than 2,200 German specialists and their families—more than 6,000 people—with Operation Osoaviakhim during one night on October 22, 1946.

In a secret directive circulated on September 3, 1946, President Truman officially approved Operation Paperclip and expanded it to include 1,000 German scientists under "temporary, limited military custody". News media revealed the program as early as December 1946.

On April 26, 1946, the Joint Chiefs of Staff issued directive JCS 1067/14 to General Eisenhower instructing that he "preserve from destruction and take under your control records, plans, books, documents, papers, files and scientific, industrial and other information and data belonging to ... German organizations engaged in military research"; and that, excepting war-criminals, German scientists be detained for intelligence purposes as required.

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