In bay 3 of the Orbiter Processing Facility, the orbiter boom sensor system (OBSS) is lifted off a stand. The boom will be reinstalled in Discovery's payload bay. It was removed last week in order to inspect the power system, which is routine after every flight. Discovery returned from mission STS-121 in late July, and is now being processed for mission STS-116, scheduled to launch in mid-December. Photo credit: NASA/Jim Grossmann