CAPE CANAVERAL, Florida -- SpaceX CEO and chief designer Elon Musk says a "slightly high combusion chamber pressure" on engine 5 caused computers to shut down a SpaceX Falcon 9 rocket launch attempt as the countdown reached zero this morning at Cape Canaveral. Musk said on Twitter that SpaceX will try again "in a few days."

The launch countdown reached zero at 3:55 CDT but there was no ignition or liftoff. SpaceX crews then began shutdown safety procedures, and the space station was notified of the failure to launch. The next try could come Tuesday morning at 2:44 a.m. CDT.



SpaceX is attempting to become the first private company to dock with the International Space Station. The unmanned Dragon 9 was to begin a three-day mission hightlighted by the docking attempt on Tuesday.