Kennedy Space Center Launch Complex 39

The Crew Dragon capsule, placed atop a SpaceX Falcon 9 rocket, is expected to launch from NASA's Kennedy Space Center in Florida on Saturday at 19:49(ET). Three NASA astronauts — Michael Hopkins, Victor Glover, and Shannon Walker — will be joined by Soichi Noguchi, an astronaut with Japan's space agency, JAXA, on the trip.
The flight of four astronauts to the International Space Station in a Crew Dragon capsule atop a Falcon 9 rocket follows the success of the Demo-2 mission and its historic splashdown. It will also set a few key spaceflight milestones.

NASA's SpaceX Demo-2 mission is set to launch on May 27 at 4:33 p.m. EDT. The SpaceX Falcon 9 rocket and Crew Dragon spacecraft will transport two NASA astronauts to the International Space Station to provide "critical data on the performance of the Falcon 9 rocket, Crew Dragon spacecraft, and ground systems, as well as in-orbit, docking, and landing operations".

NASA astronauts Robert Behnken and Douglas Hurley have been working and training on SpaceX's next-generation human space vehicle. The two astronauts will lift off on a Falcon 9 rocket on May 27 from the Launch Complex 39A in Florida that will take them to the International Space Station for an extended stay for the Demo-2 mission. NASA calls this mission a "new era of human spaceflight" and believe it will "not only renew American capability to launch astronauts from U.S. soil" but it will also "expand the number of crew members on board the station".