Hydrogen gas leak forces another launch delay

(AP) -- NASA has called off Wednesday's launch attempt for space shuttle Endeavour because of another hydrogen gas leak.

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<p><a href="http://www.physorg.com/news164423908.html">Hydrogen gas leak forces another launch delay</a></p> <p>(AP) -- NASA has called off Wednesday's launch attempt for space shuttle Endeavour because of another hydrogen gas leak.</p>