Rocket and spacecraft on launch pad for NASA's SpaceX Demo-2 mission(1/3)

This photo released by NASA shows a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft onboard on the launch pad at Launch Complex 39A as preparations continue for the Demo-2 mission, May 25, 2020, at NASA's Kennedy Space Center in Florida. (Photo/Agencies)

A pelican takes flight from its perch near the SpaceX Falcon 9 rocket with the Crew Dragon spacecraft at launch complex 39A at the Kennedy Space Center in Florida on May 25, 2020. NASA astronauts Bob Behnken and Doug Hurley will depart for an extended stay at the International Space Station on the Demo-2 mission on May 27, 2020. While the specific duration of the mission has yet to be determined, the Crew Dragon flight will mark the first manned flight to launch from Cape Canaveral since the end of the space shuttle program in 2011. (Photo/Agencies)

This handout photo released by NASA shows a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft onboard on the launch pad at Launch Complex 39A as preparations continue for the Demo-2 mission, May 25, 2020, at NASA's Kennedy Space Center in Florida. (Photo/Agencies)