 The Expedition 63 crew welcomed the Crew Dragon Demo-2 mission for a stay on board the station on 31 May 2020.This flight marks the first crewed test flight of SpaceX Crew Dragon spacecraft and the first crewed spacecraft to launch from US soil since STS-135, the final flight of the Space Shuttle program, in 2011.The mission is crewed by NASA astronauts Doug Hurley and Robert Behnken, who are scheduled to remain on board the ISS for two to three months.