On This Day… Endeavour Launches on ASTRO-2 Mission

#OTD in 1982…Columbia launches on the fourth space shuttle mission. #OTD in 1995…Atlantis launches on first shuttle-Mir docking flight

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

#OTD in 2009…Endeavour launched to complete the Japanese segment of the International Space Station