NASA astronauts Chris Cassidy and Bob Behnken will start their second spacewalk together on July 1. The duo will continue upgrading power systems on the International Space Station. The veteran spacewalkers wrapped up a spacewalk on Friday after six hours and 7 minutes swapping five aging nickel-hydrogen (NiH2) batteries with two new lithium-ion (Li-Ion) batteries. …
Astronauts Look to Wednesday’s Spacewalk
