Spacewalkers Christina Koch and Andrew Morgan

iss061e005398 (Oct. 11, 2019) --- Spacewalkers Christina Koch (foreground, suit with no stripes) and Andrew Morgan (suit with red stripes) of NASA work while tethered on the Port 6 truss segment of the International Space Station to replace older hydrogen-nickel batteries with newer, more powerful lithium-ion batteries during the six-hour and 45-minute spacewalk.