VIDEO: First NTSB briefing on Virgin Galactic accident

SpaceX rolled out a Falcon 9 rocket Sunday night to pad 39A at NASA’s Kennedy Space Center in Florida for liftoff with the next 60 Starlink internet satellites, but officials have pushed back the launch until Wednesday.

The nine Merlin main engines at the base of a recycled Falcon 9 rocket booster ignited Thursday night for several seconds during a pre-flight test-firing on a Cape Canaveral launch pad, clearing a major hurdle ahead of a scheduled May 31 liftoff with a high-power communications satellite for SES.

Remote sound-triggered cameras around launch pad 39A captured stunning views of Thursday evening’s launch of a SpaceX Falcon 9 rocket on the first reflight of a commercial orbital-class booster.