Expedition 48 Commander Jeff Williams (shown here) and Flight Engineer Kate Rubins of NASA successfully installed the first of two international docking adapters (IDAs) Friday Aug. 19, 2016, during a five hour and 58-minute spacewalk. The IDAs will be used for the future arrivals of Boeing and SpaceX commercial crew spacecraft in development under NASA’s Commercial Crew Program. Credit: NASA #SpaceWalk #nasa #katerubins #jeffwilliams #iss #astronaut