Video: Falcon 9 launch replays

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.

A SpaceX Dragon capsule packed with more than 5,000 pounds of hardware, provisions and experiments launched July 25 from Cape Canaveral and arrived at the International Space Station two days later.

SpaceX and OneWeb — space industry rivals and owners of two of the largest fleets of commercial satellites — are set to add more spacecraft to their internet networks Wednesday with launches from Cape Canaveral and Russia.