KENNEDY SPACE CENTER, FLA. - In the Vehicle Assembly Building at NASA’s Kennedy Space Center, Ken Revay, the ET_SRB processing manager with United Space Alliance, inspects the newly installed liquid oxygen bellows heater on External Tank 120, recently removed from the orbiter Discovery. The new heater has been added to the feedline bellows to minimize the potential for ice and frost buildup. ET-120 will fly with Atlantis on the second Return to Flight mission STS-121. The launch window for STS-121 extends from Sept. 9 - 24.

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