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KENNEDY SPACE CENTER, FLA. -- On Launch Pad 39A, technicians identify an area on space shuttle Atlantis' external tank that might be cut out if tests prove the need to get to the pass-through wiring associated with the engine cut-off, or ECO, sensor system. The shuttle's planned launches on Dec. 6 and Dec. 9 were postponed because of false readings from the part of the ECO system that monitors the liquid hydrogen section of the tank. The liftoff date from NASA's Kennedy Space Center, Florida, is now targeted for Jan. 10, depending on the resolution of the problem in the fuel sensor system. Photo credit: NASA/Kim Shiflett