NASA aims to launch Discovery shuttle Feb 24

Washington (AFP) Jan 11, 2011 NASA said Tuesday it will aim to launch the space shuttle Discovery on February 24, after engineers found a way to shore up cracks on the external fuel tank that have delayed its final liftoff. NASA engineers have been working since November to figure out why cracks were emerging on the 22-foot-long U-shaped aluminum brackets, called stringers, on the shuttle’s external fuel tank. Accord


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