KH-6 (Keyhole 6, codenamed Lanyard) was an early attempt to gain higher resolution imagery, which flew only one successful mission in 1963. It was part of the Corona program. March 18, 1963 at 21:13 UTC · Launch Failure Thor SLV-2A Agena D — United States Air Force, to Low Earth Orbit Space Launch Complex 1W, Vandenberg SFB, CA, USA The world's 232nd orbital launch attempt, and 8th of 1963. Data: Launch Library 2, The Space Devs. Image via The Space Devs.