Time-lapse video: Falcon 9 positioned for 2nd launch attempt

The spacecraft was originally scheduled to dock with the International Space Station the morning of Wednesday, Sept. 17. An alternate plan is in the works.

SpaceX is counting down to liftoff Saturday of a Falcon 9 rocket with a commercial cargo craft heading for the International Space Station after engineers replaced a component in an upper stage steering system that grounded the launcher Tuesday.

SpaceX rocket technicians offloaded the first stage of a Falcon 9 rocket from its landing platform Tuesday, beginning a pioneering test campaign to verify its readiness for another launch later this year.