Spacewalker and NASA astronaut Christina Koch

iss059e005281 (March 29, 2019) --- Spacewalker and NASA astronaut Christina Koch retrieves hardware from a pallet delivered on the Japan Aerospace Exploration Agency's (JAXA) HTV-7 (H-II Transfer Vehicle-7) to continue upgrading the International Space Station's power storage capacity. She and fellow spacewalker Nick Hague (out of frame) worked outside in the vacuum of space for six hours and 45 minutes to continue swapping batteries and install adapter plates on the station's Port-4 truss structure.