Workers install the orbiter boom sensor system in the payload bay of space shuttle Discovery to support STS-128.

In the Orbiter Processing Facility’s bay 3, workers install the orbiter boom sensor system in the payload bay of space shuttle Discovery to support mission STS-128. The 50-foot-long boom attaches to the shuttle arm and provides equipment to inspect the shuttle's heat shield while in space. It contains an intensified television camera (ITVC) and a laser dynamic range imager, which are mounted on a pan and tilt unit, and a laser camera system (LCS) mounted on a stationary bracket. The STS-128 flight will carry science and storage racks to the International Space Station on space shuttle Discovery. Launch of Discovery is targeted for Aug. 6. Photo credit: NASA/Jim Grossmann