OV4-3 was an MOL cannister launched by the US Air Force from Cape Canaveral aboard a Titan 3C rocket. The Manned Orbiting Laboratory (MOL) was the US Air Force's planned manned space project after Dynasoar was cancelled, until it in turn was cancelled in 1969. Experiments planned ranged the gamut from military reconnaisance using large optical cameras and side-looking radar, through interception and inspection of satellites, to exploring the usefullness of man in space and test of manned maneuvering units. After cancellation, some of the reconnaisance systems ended up in later KH series satellites, and some of the manned experiments were accomplished on Skylab.