Live coverage of the countdown and launch of an H-2A rocket with the Astro-H X-ray astronomy mission. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
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Live coverage: Ariane 5 launch aborted
The launch of a European Ariane 5 rocket was aborted moments after its main engine ignited Tuesday. The dramatic last-second hold was the first time an Ariane rocket launch was aborted after engine start since March 2011. Arianespace has not set a new target launch date for the mission, which will loft two U.S.-built communications satellites for Intelsat and B-SAT.