OTD…June 3, 1965 and the first American walk in space

Shuttle Endeavour launched for the 25th and final time on this date in 2011.

Two Russian cosmonauts stepped outside the International Space Station Wednesday, sent birthday greetings to former cosmonaut Alexey Leonov, the first man to walk in space, and then carried out a full slate of maintenance work.

#OTD in 1985…Challenger launched the first German Spacelab