OTD…April 29 and STS-51B

OTD…Launch of Discovery in 1991 on a Defense Department research flight

Dave Scott, Jim Irwin and Al Worden left for the Moon today in 1971 aboard Apollo 15 bound for Hadley rille with the first Lunar Roving Vehicle.

Today in 1996…The launch of Columbia and the ill-fated Tethered Satellite System. Watch the liftoff: