OTD…July 12 and STS-104

#OTD in 1998…The launch of Discovery on final shuttle-Mir docking mission

#OTD in 2000…Discovery launched on the 100th space shuttle mission

The final manned Mercury mission was launched atop an Atlas rocket on this day in 1963 with Gordon Cooper aboard Faith 7 for a 34-hour, 22-orbit flight.