KENNEDY SPACE CENTER, FLA. - In Orbiter Processing Facility bay 1 at NASA’s Kennedy Space Center, United Space Alliance technician Greg Goforth uses a laser tool to take step and gap measurements on Thermal Protection System tiles on the underside of orbiter Atlantis. Other processing continues on Atlantis for its mission, designated STS-121, to the International Space Station. The launch planning window is Sept. 9 - 24.

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Photo credit: © NASA/piemags / Alamy / Afripics
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