Astronaut Bob Behnken conducts a spacewalk

iss063e034050 (July 1, 2020) --- NASA astronaut and Expedition 63 Flight Engineer Bob Behnken (bottom right) works during a six-hour and one-minute spacewalk to swap an aging nickel-hydrogen battery for a new lithium-ion battery on the International Space Station's Starboard-6 truss structure. Behind Behnken is an external pallet, attached to the Canadarm2 robotic arm, where the batteries were stowed.