KENNEDY SPACE CENTER, FLA. -- At right, Mike Young and Les Hanks, with United Space Alliance, prepare a window on Atlantis for removal. The windows are being removed to inspect them for contaminants in the thermal seal. Atlantis has been undergoing routine maintenance in the Orbiter Processing Facility for Return to Flight, on mission STS-114.

KENNEDY SPACE CENTER, FLA. -- At right, Mike Young and Les Hanks, with United Space Alliance, prepare a window on Atlantis for removal. The windows are being removed to inspect them for contaminants in the thermal seal. Atlantis has been undergoing routine maintenance in the Orbiter Processing Facility for Return to Flight, on mission STS-114.