NASA astronauts Douglas Hurley (left) and Robert Behnken (right) participate in a dress rehearsal for launch at the agency's Kennedy Space Center, Florida, USA, 23rd on May 2020, ahead of NASA's SpaceX Demo-2 mission to the International Space Station. Demo-2 will serve as an end-to-end flight test of SpaceX's crew transportation system, providing valuable data toward NASA certifying the system for regular, crewed missions to the orbiting laboratory under the agency's Commercial Crew Program. Liftoff is targeted for 4:33 p.m. EDT on 27th May.