Watch the Falcon 9 launch from pad 39A

SpaceX is targeting Dec. 19 for a critical commercial launch that will double as the debut flight of an upgraded Falcon 9 rocket and the company’s return-to-flight mission after a failure six months ago halted SpaceX’s busy launch manifest.

Six days after SpaceX fired its last Falcon 9 rocket from NASA’s Kennedy Space Center, another launcher rolled to historic pad 39A and ignited its nine Merlin 1D engines at sunset Thursday in preparation for a commercial satellite delivery mission Sunday for Intelsat.

The crew spent 197 days docked at the ISS and welcomed seven visiting vehicles while on orbit. Splashdown off the coast of Florida is anticipated around 5:50 a.m. EDT on Tuesday, March 12.