Originally called Operation Overcast, Operation Paperclip was the codename for the operation by the US intelligence services and military to extract scientists specialising in rocketry (e.g. V-1, V-2), chemical weapons (e.g. Zyklon-B) and medicine from Germany after the collapse of the Nazi government during World War II. These scientists and their families were secretly brought to the United States, without State Department review and approval. None of them qualified for visas because they had all served to further the cause of Hitler's Third Reich in World War II.
Over 700 members of the Nazi scientific community were brought to the US as a direct result of Operation Paperclip, many of whom were still ardent Nazi supporters.
Although PresidentHarry S. Truman gave explicit orders not to allow any scientists who were thought to have strong Nazi leanings to enter the US under Operation Paperclip, many dossiers were re-written to "clean-up" the histories of many of the scientists involved, to prevent them and their expertise falling into the hands of the Soviet Union.
Much of the information surrounding Operation Paperclip is still classified.
Separate from Paperclip was an even-more-secret effort to capture German nuclear secrets, equipment and personnel. See Operation Alsos. Another American project (TICOM) gathered German experts in cryptography.
Operation Paperclip was the codename under which the US intelligence and military services extricated scientists from Germany, during and after the final stages of World War II.
These scientists and their families were secretly brought to the United States, without State Department review and approval; their service for Hitler's Third Reich, NSDAP and SS memberships as well as the classification of many as war criminals or security threats would have disqualified them from officially obtaining visas.
An aim of the operation was capturing equipment before the Soviets came in.