Live coverage of the countdown and launch of a SpaceX Falcon 9 rocket from Cape Canaveral with the SES 9 communications satellite. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
SpaceX’s live video coverage begins at 6:25 p.m. EST (2325 GMT).
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A SpaceX Falcon 9 rocket and Crew Dragon capsule were raised vertical at launch pad 39A in Florida late Thursday, setting the stage for a launch day dress rehearsal Friday with NASA astronauts Doug Hurley and Bob Behnken — the veteran space fliers assigned to the Crew Dragon’s first piloted mission later this year — before a critical in-flight test of the ship’s emergency escape system Saturday.