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MISSION CONTROL: Discovery, Houston. Good news, you're go for

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the deorbit burn and you can do the APU start on time.

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PAM MELROY: Copy, go for the deorbit burn. APU start on time.

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KYLIE CLEM: The propulsion officer here in mission control reporting that both orbital maneuvering system

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engines are firing for the deorbit burn. It will remain on for 1 minute and 53 seconds to slow the

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shuttle by about 215 feet per second, or 147 miles per hour, serving as the braking rockets to enable

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Discovery to drop out of orbit for its hourlong descent back to Earth. each orbital

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maneuvering system engine providing 6,000 pounds of thrust for this maneuver.