OTD…Oct. 3 and STS-51J

#OTD in 1995…Discovery launched a Tracking and Data Relay satellite

#OTD in 2005…Discovery launched on the first space shuttle mission after the Columbia tragedy

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.