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

After a bit of a struggle with a balky bolt, space station commander Peggy Whitson replaced a failed external computer during a short, hurriedly planned spacewalk Tuesday while crewmate Jack Fischer installed a pair of antennas to improve wireless communications during future excursions.

#OTD in 1995, Endeavour launched on the ASTRO-2 astronomy mission:

Two astronauts plan to venture outside the International Space Station Friday, taking over from earlier robotic arm operations to help replace a set of batteries used to store power from one of the lab’s four sets of solar arrays.