VIDEO: First NTSB briefing on Virgin Galactic accident

Launching its 10th mission this year, SpaceX delivered an Intelsat communications satellite to a high-altitude transfer orbit Wednesday with a Falcon 9 rocket launched from Kennedy Space Center in Florida.

SpaceX test-fired a Falcon 9 rocket Wednesday afternoon at NASA’s Kennedy Space Center in Florida, clearing a major hurdle before it launches Saturday night — weather permitting — with a four-person crew heading for the International Space Station.

Working overnight on Florida’s Space Coast, SpaceX technicians transferred a two-stage Falcon 9 rocket from the company’s commercial hangar a quarter-mile up the ramp to launch pad 39A early Saturday, positioning the kerosene-fueled booster for liftoff Sunday with a classified payload for the U.S. government’s National Reconnaissance Office.