OTD…May 11 and STS-125

Neil Armstrong, Buzz Aldrin and Michael Collins launched today in 1969 aboard Apollo 11 for one of the defining moments of the 20th century — man’s first landing on the moon.

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

#OTD…Launch of Challenger in 1985 on a Spacelab research flight