WEBVTT

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George Diller/NASA Launch Commentator: From Launch Complex 39 at the Kennedy Space Center in Florida,

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this is Shuttle Launch Control at T-3 hours and holding.

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We are now in the final 5 1/2 hours of the countdown for the launch of Atlantis on mission STS-125.

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The countdown is being controlled from Firing Room 4 in the Launch Control Center.

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We're on schedule for liftoff, targeted for 2:01 p.m. Eastern time.

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This is the 126th launch of the Space Shuttle Program, the 30th launch of space shuttle Atlantis,

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and the fifth mission for maintenance of the Hubble Space Telescope.

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There are five EVA's, or spacewalks, planned for this mission, which is scheduled to last 11 days.

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Landing is currently planned for May 22, at 11:41 a.m.

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There are seven astronauts who will shortly be aboard Atlantis en route to a rendezvous with the Hubble Space Telescope.

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The astronauts are Commander Scott Altman, Pilot Greg Johnson,

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Mission Specialists Michael Good, Megan McArthur,

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John Grunsfeld, Mike Massimino and Andrew Feustel.

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