Expedition 45 commander Scott Kelly and flight engineer Kjell Lindgren have switched their spacesuits to battery power to begin planned six-and-a-half-hour spacewalk Wednesday outside the International Space Station.

Astronauts Steve Bowen and Woody Hoburg suited up and floated outside the International Space Station Friday for a spacewalk to install and unroll an upgraded solar array wing delivered to the complex earlier this week by a SpaceX Cargo Dragon supply ship.

Watch NASA’s news conference to preview three spacewalks outside the International Space Station planned for late March and early April to prepare for the future arrival of U.S. commercial crew spacecraft and upgrade station hardware.