NASA astronaut Eric Boe, assistant to the chief of the astronaut office for commercial crew, left, NASA astronaut Bob Behnken, Norm Knight, deputy director of flight operations at NASA's Johnson Space Center and chief of the astronaut office Pat Forrester monitor the countdown of the launch of a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft on the Demo-1 mission from firing room four of the Launch Control Center, Saturday, March 2, 2019 at the 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. The mission will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)