SpaceX rocket launch aborted in last half-second

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A new private supply ship for the International Space Station remained stuck on the ground Saturday after rocket engine trouble led to a last-second abort of the historic flight.

All nine engines for the SpaceX Falcon 9 rocket roared to life Saturday morning. But with a mere half-second remaining before liftoff, the onboard computers automatically shut everything down. So instead of blasting off on a delivery mission to the space station, the rocket stayed on its launch pad amid a plume of engine exhaust.