Dafydd Williams Tracy Caldwell and Richard Mastrocchio get instructions on using photo equipment for their flight.

In Orbiter Processing Facility bay 2, during crew equipment interface test activities, STS-118 Mission Specialists Dr. Dafydd Williams, Tracy Caldwell and Richard Mastrocchio get instructions on using photo equipment for their flight. The STS-118 mission will be delivering the third starboard truss segment, the ITS S5, to the International Space Station, as well as the SPACEHAB single cargo module filled with supplies and equipment. Launch aboard Space Shuttle Endeavour is targeted for Aug. 9. Photo credit: NASA/Kim Shiflett