English: SpaceX CEO and Chief Designer Elon Musk, second from left, NASA Administrator Jim Bridenstine, third form right, and NASA astronauts Mike Hopkins, Victor Glover, Doug Hurley and Bob Behnken are seen with the SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft onboard during a tour of Launch Complex 39A before the early Sunday morning launch of the Demo-1 mission, Friday, March 1, 2019 at the Kennedy Space Center in Florida. The Demo-1 mission launched at 2:49am ET on Saturday, March 2 and was the first launch of a commercially built and operated American spacecraft and space system designed for humans as part of NASA's Commercial Crew Program. The mission will serve as an end-to-end test of the system's capabilities. Hurley and Behnken are assigned to fly onboard Crew Dragon for the Demo-2 mission and Glover and Hopkins have been assigned to fly to the International Space Station on Crew Dragon's first operational mission. Photo Credit: (NASA/Joel Kowsky)