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HOUSTON: The next event is burnout and separation of the twin solid

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rocket boosters, which are burning propellant at a

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rate of 11,000 pounds per second.

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SRB separation is confirmed two minutes, 15 seconds into the flight.

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Atlantis is traveling 3,000 miles per hour, downrange from the Kennedy

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Space Center 46 miles, altitude 35 miles.

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