NASA astronaut Bob Behnken during a spacewalk

iss063e033443 (June 26, 2020) --- NASA astronaut Bob Behnken is pictured during a spacewalk to swap batteries and upgrade power systems on the International Space Station's Starboard-6 truss structure. Behnken was joined during the six-hour and seven-minute excursion by NASA astronaut Chris Cassidy (out of frame).