NASA astronauts Andrew Morgan and Christina Koch are suited up in U.S. spacesuits

iss061e001577 (Oct. 6, 2019) --- NASA astronauts Andrew Morgan (left) and Christina Koch (right) are suited up in U.S. spacesuits inside the Quest airlock before beginning a seven hour and one minute spacewalk to upgrade the station's large nickel-hydrogen batteries with newer, more powerful lithium-ion batteries.