The KH-4A (Keyhole-4A) was the fifth optical reconnaissance satellite version in the Corona-program. March 24, 1964 at 22:22 UTC · Launch Failure Thor SLV-2A Agena D — United States Air Force, to Low Earth Orbit Space Launch Complex 3W, Vandenberg SFB, CA, USA The world's 310th orbital launch attempt, and 17th of 1964. Data: Launch Library 2, The Space Devs. Image via The Space Devs.