NASA astronauts Douglas Hurley, left, and Robert Behnken wave as they walk out of the Neil A. Armstrong Operations and Checkout Building at the Kennedy Space Center in Cape Canaveral, Fla. (AP Photo/John Raoux)
AP Photo/John Raoux
SpaceX Launch
NASA astronauts Douglas Hurley, left, and Robert Behnken wave as they walk out of the Neil A. Armstrong Operations and Checkout Building at the Kennedy Space Center in Cape Canaveral, Fla. (AP Photo/John Raoux)
AP Photo/John Raoux