On August 19, 2016 American astronauts Jeffrey Williams and Kathleen Rubins performed the spacewalk to attach docking adapter to space station for commercial vehicles. Attached to the station’s no-longer-needed shuttle port at the front of the station, the Boeing-built International Docking Adapter will allow spacecraft from Boeing and SpaceX companies to bring crews to the ISS, ending NASA’s sole reliance on Russian Soyuz ferry spaceships. The new docking mechanism was carried up to the station aboard a SpaceX Dragon cargo ship in June. The EVA lasted 5 hours and 58 minutes. It was the fourth spacewalk for Jeffrey Williams and the first one for Kathleen Rubins.