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SpaceX Halts Rocket Launch 10 Seconds Before Planned Liftoff

Space X's Falcon 9 rocket is prepared for a launch to the International Space Station Feb. 17.

Space X's Falcon 9 rocket is prepared for a launch to the International Space Station Feb. 17.

Photographer: Bruce Weaver/AFP via Getty Images
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Elon Musk’s Space Exploration Technologies Corp. halted the launch of its second rocket in as many months on Saturday, about 10 seconds before its scheduled liftoff.

“All systems go, except the movement trace of an upper stage engine steering hydraulic piston was slightly odd. Standing down to investigate,” Musk said in a Twitter post.