NASA astronaut Christina Koch (born 1979) reflected on NASA astronaut Jessica Meir's (born 1977) spacesuit helmet whilst photographing her crewmate during a spacewalk. The two Expedition 61 flight engineers were finalizing upgrades to power systems on the International Space Station's (ISS) Port-6 truss structure. Meir and Koch are the first women to participate in an all-female spacewalk. Photographed on 20th January 2020.