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

Two astronauts floated outside the International Space Station Sunday for the first in a series of spacewalks to upgrade the lab’s aging solar power system, assembling a support fixture that eventually will hold a new solar blanket.

Expedition 50 astronauts Shane Kimbrough and Thomas Pesquet will head outside the International Space Station today to continue battery replacement work.

#OTD in 1985…Discovery launched on the first classified space shuttle mission for the Department of Defense. Watch the liftoff: