Williams and Wilmore both arrived at the ISS last June, aboard the first crewed test flight of Boeing's Starliner spacecraft.
NASA astronauts Sunita Williams and Butch Wilmore removed a broken ISS antenna during their first spacewalk together.
"Here we go," Mr Wilmore remarked as he exited the station, 420 kilometres above Earth, in a video livestreamed by NASA on X.
On Tuesday, astronauts aboard the International Space Station focused on two key tasks: preparing for an upcoming spacewalk ...