This image made available by NASA shows astronaut Anne McClain working on March 22, 2019, on the International Space Station’s Port-4 truss structure during a six-hour, 39-minute spacewalk to upgrade the orbital complex’s power storage capacity. (Photo by HO / NASA / AFP) / RESTRICTED TO EDITORIAL USE – MANDATORY CREDIT “AFP PHOTO / NASA” – NO MARKETING – NO ADVERTISING CAMPAIGNS – DISTRIBUTED AS A SERVICE TO CLIENTS