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KENNEDY SPACE CENTER, FLA. -- Deep shadows are broken by the fiery launch of Space Shuttle Endeavour as it leaps free of Launch Pad 39A to begin mission STS-118. Liftoff was on time at 6:36 p.m. EDT. The mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. Photo credit: NASA/Sandra Joseph, Tony Gray, Robert Murray