Looking into the open payload bay doors of Space Shuttle Endeavour workers conclude closeouts.

Looking into the open payload bay doors of Space Shuttle Endeavour, workers conclude closeouts. At center foreground is the orbital docking system. The red ring at top comprises rain gutters to prevent leaks into the bay from rain while the shuttle is on the pad. The payload bay doors were opened to allow for payload closeouts, including camera tests on the shuttle robotic arm and the extension, known as the orbiter boom sensor system. Endeavour is scheduled to launch Aug. 7 on mission STS-118, the 22nd flight to the International Space Station. NASA/Charisse Nahser