A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft onboard is seen as it is rolled to the launch pad at Launch Complex 39A as preparations continue for the Demo-1 mission, Feb. 28, 2019 at NASA's Kennedy Space Center in Florida. The Demo-1 mission will be 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. (Photo/Agencies)
A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft onboard is seen as it is rolled to the launch pad at Launch Complex 39A as preparations continue for the Demo-1 mission, Feb. 28, 2019 at NASA's Kennedy Space Center in Florida. The Demo-1 mission will be 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. (Photo/Agencies)
A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft onboard is seen as it is rolled to the launch pad at Launch Complex 39A as preparations continue for the Demo-1 mission, Feb. 28, 2019 at NASA's Kennedy Space Center in Florida. The Demo-1 mission will be 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. (Photo/Agencies)