Rosenberg provided thousands of classified reports from Emerson Radio, including a complete proximity fuse, an upgraded model of which was used to shoot down Gary Powers' U-2 in 1960. Under Feklisov's administration, Rosenberg recruited sympathetic individuals into NKVD service, including Joel Barr, Alfred Sarant, William Perl and Morton Sobell.[14] Perl supplied Feklisov, under Rosenberg's direction, with thousands of documents from the National Advisory Committee for Aeronautics, including a complete set of design and production drawings for Lockheed's P-80 Shooting Star, the first U.S. jet plane.