STS 118 crew members get a close look at the payloads installed in Space Shuttle Endeavour.

STS-118 crew members get a close look at the payloads installed in Space Shuttle Endeavour. Seen in the foreground are Mission Specialists Dave Williams (center), who represents the Canadian Space Agency, and Tracy Caldwell (right). In the background is Mission Specialist Rick Mastracchio. The STS-118 crew has been at Kennedy for terminal countdown demonstration test activities that also include M-113 training, emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton