Classified information was the topic of many productions at Signal Corps Photographic Center, so it was a logical target for spies.  In his 1971 account of the Nazi spy network, "The Game of Foxes," author Ladislas Farago described the activities of Nazi spy Simon Emil Koedel, who committed espionage in the U. S. from 1936 to at least 1943. 

Koedel was a "one-man general store of espionage," wrote Farago, and his "observations ranged from the U. S. Army's Chemical Warfare Center ... to the Army's motion picture establishment in Queens, Long Island (where he procured classified training films and movies showing tanks, ships, all sorts of equipment, and the confidential testing of new weapons.)"

(Posted April 7, 2005; updated September 12, 2020.)