PICTURE CREDITS
Cover—Charles McLaughlin, Grumman Aircraft Engineering Corp.; 56—Aviation Week; 57— Viron Div., Geophysics Corp.; 58—General Electric; 59—NASA/USAF; 60—McDonnell Aircraft Corp.; 61—(top) NASA/USAF, (bottom) Lockheed-Georgia Co.; 63—NASA; 64—(top) PFC Paul Wilkes, Army, (bottom) Douglas Aircraft Co.; 65—United Technology; 67—USAF/USIS; 71— Hughes Aircraft; 72—Antenna Systems, Inc.; 73—Lockheed Electronics; 78—American Airlines; 79—British Aircraft; 83—Piper Aircraft.