PreacherTom writes "Following recent delays, NASA makes its fifth attempt to get Atlantis off the launchpad at 11:15 a.m. EDT today. NASA stopped Friday's launch try only 45 minutes before its scheduled departure for a faulty fuel tank sensor: the same glitch that thwarted two previous missions. The launch delay cost NASA $616,000, and if the mission is scrubbed again, the space agency must abandon for a few weeks its efforts to send the shuttle off on a construction mission to the International Space Station."
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