Q&A with Elon Musk, SpaceX’s founder and CEO

Following two Falcon 9 launches from both California and Florida, SpaceX closed out the first weekend of December with a Falcon Heavy static fire test. The ignition of the 27 Merlin engines comes a week ahead of the planned launch of the U.S. military’s secretive X-37B spaceplane.

Watch as the launch of a Falcon 9 rocket on a space station resupply run is aborted 13 seconds before liftoff when ground controllers were alerted to a potential problem with the vehicle’s second stage steering system.

SpaceX’s Falcon 9 rocket is set for liftoff from Cape Canaveral on Sunday, heading due south over the Atlantic Ocean on a trajectory hugging the east coast of Florida to deliver 143 small satellites into polar orbit.