Discovery became the latest space shuttle to encounter trouble when a crane yanked one of its payload bay doors.
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A hydrogen leak somewhere inside Columbia has that shuttle's astronomy mission on hold. NASA plans a fueling test Wednesday in a last-ditch attempt to find the leak without having to roll the shuttle back to its hangar - a move that would mean a month's delay.Discovery sustained possible damage Monday when a corner of a payload bay door was snagged by an overhead bridge, which acts as a crane, NASA spokesman Bruce Buckingham said. The open door flexed 10 to 12 inches upward, then snapped back into position when the bridge operator moved back.