A flight carrying particle detectors. It was the only completely successful flight of the initial Blue Scout Junior program. December 4, 1961 at 04:00 UTC · Launch Successful Blue Scout Jr — United States Air Force, to Suborbital Launch Complex A, Vandenberg SFB, CA, USA Data: Launch Library 2, The Space Devs. Image by U.S. Air Force (Department of Defense Image Use Policy) via The Space Devs.