NASA astronauts Robert Behnken (right) and Doug Hurley wave as they walk out of the Neil A. Armstrong Operations and Checkout Building at the agency’s Kennedy Space Center in Florida during a full dress rehearsal for launch on May 23, 2020, ahead of NASA’s SpaceX Demo-2 mission to the International Space Station. A SpaceX Falcon 9 rocket and Crew Dragon spacecraft will carry Behnken and Hurley to the orbiting laboratory as part of the agency’s Commercial Crew Program, returning human spaceflight capability to the U.S. after nearly a decade. Launch is slated for 4:33 p.m. EDT on Wednesday, May 27, from Kennedy’s Launch Complex 39A.