A SpaceX Falcon 9 rocket lifted off from Launch Complex 39A at the Kennedy Space Center at 23:21 UTC (7:21 p.m. EDT) on May 15, 2017 on a Supersynchronous Transfer Mission

The Inmarsat 5-F4 satellite arrives at SpaceX’s processing facility in Florida after a cross-country trip from Boeing’s El Segundo, California manufacturing base to enter final preparations for a May 2017 liftoff atop an expendable Falcon 9 rocket.