Image above: 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. Photo credit: NASA/George Shelton

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STS-118 crew completes countdown rehearsal

This week at NASA's Kennedy Space Center, the STS-118 crew members completed a full dress rehearsal for their upcoming launch aboard Space Shuttle Endeavour.

The simulated countdown at Launch Pad 39A concluded the terminal countdown demonstration test, a standard part of prelaunch training which allows the astronauts to try on their launch and entry suits, learn emergency procedures at the launch pad, and take part in a variety of familiarization activities and briefings.

With the test now successfully behind them, the seven astronauts have returned to Johnson Space Center in Houston.

Space Shuttle Endeavour has been in place at the launch pad since July 11, and the STS-118 payload - including the S5 truss, SPACEHAB module and external stowage platform 3 - is secured inside the orbiter's payload bay.

Launch is targeted for the evening of August 7.