Video: Falcon 9 rocket fires engines in pre-launch test (members only)

Two days after a successful launch from California, SpaceX fired off another Falcon 9 rocket from Cape Canaveral Wednesday, this one carrying a Dragon cargo ship loaded with 5,660 pounds of equipment and supplies bound for the International Space Station.

As expected, NASA announced Wednesday that the first unpiloted test flight of a SpaceX Falcon 9 rocket and a Crew Dragon astronaut ferry ship has slipped from later this month to March 2. The first unpiloted flight of Boeing’s Starliner capsule is now targeted for the April timeframe.

United Launch Alliance’s first Vulcan rocket was filled with methane and liquid oxygen propellants at Cape Canaveral last week for a tanking test, but managers decided to move the rocket back inside a hangar for a few adjustments before proceeding with an engine test-firing.