Spacewalker Chris Cassidy works on the Tranquility module

iss063e052607 (July 21, 2020) --- NASA astronaut and Expedition 63 Commander Chris Cassidy conducts a spacewalk to set up the Tranquility module for the future installation of a NanoRacks airlock that will enable public and commercial research on the outside of the International Space Station. Cassidy has completed 10 spacewalks throughout his career for a total of 54 hours and 51 minutes spacewalking time.