Time-lapse video: The Falcon Heavy goes vertical again

Four days before its scheduled blastoff on a resupply run to the International Space Station, a Falcon 9 rocket ran through a countdown rehearsal and engine test Sunday at NASA’s Kennedy Space Center in Florida.

Crew Dragon astronauts Douglas Hurley and Robert Behnken thanked their space station crewmates for a productive two-month visit, readied their SpaceX capsule for departure and stood by for a final “go” from flight controllers to undock Saturday night, setting up a Gulf of Mexico splashdown Sunday afternoon.

SpaceX’s first upgraded Falcon 9 “Block 5” rocket was raised vertical at launch pad 39A early Thursday in preparation for liftoff from the Kennedy Space Center, debuting enhancements aimed at making the booster more reusable and more reliable.