NASA postpones shuttle launch to fix leak

CAPE CANAVERAL, Florida — Space shuttle Discovery's final voyage was postponed Friday until the end of the month so NASA can fix a fuel leak.
It was the fourth delay in a week for Discovery's mission to the International Space Station with six veteran astronauts and the first humanoid robot bound for orbit.
NASA tried to launch Discovery on Friday, but a potentially dangerous hydrogen gas leak cropped up midway through the fueling process and the countdown was halted.
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