KENNEDY SPACE CENTER, Fla. -- On top of the fixed service structure of Launch Pad 39A, The STS-118 crew poses for a photo after conclusion of the terminal countdown demonstration test. From left are Pilot Charlie Hobaugh, Mission Specialist Rick Mastracchio, Commander Scott Kelly, and Mission Specialists Tracy Caldwell, Barbara R. Morgan, Alvin Drew and Dave Williams. Morgan, who is making her first space flight, joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. Williams represents the Canadian Space Agency. The STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and 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