KENNEDY SPACE CENTER, FLA. - At Astrotech Space Operations in Titusville, Fla., STS-121 Mission Specialist Lisa Nowak looks at an orbital replacement unit sitting on the Integrated Cargo Carrier. She and other crew members are at KSC to take part in Crew Equipment Interface Test activities, which provide hands-on experience with equipment they will use on-orbit. STS-121, the second Return to Flight mission, is targeted for launch in a lighted planning window of Sept. 9 to Sept. 25.

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