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Rollback Completed
On Launch Pad 39A, the oxygen vent hood, called the "beanie cap," is positioned above the external fuel tank of space shuttle Discovery following the rollback of the rotating service structure, or RSS, at left.
The beanie cap is designed to vent gaseous oxygen vapors away from the shuttle. The rollback is preparation for Discovery's STS-128 mission with a crew of seven.
STS-128 will be Discovery's 37th mission and the 30th shuttle flight dedicated to station assembly and maintenance.
Photo credit: NASA/Troy Cryder
August 24, 2009
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