August 23, 1961 at 10:04 UTC · Launch was a Partial Failure Atlas LV-3 Agena B — United States Air Force Launch Complex 12, Cape Canaveral SFS, FL, USA The world's 121st orbital launch attempt, and 28th of 1961. Data: Launch Library 2, The Space Devs. Image by NASA (NASA Image and Media Guidelines) via The Space Devs.