4th Shuttle Launch Attempt Tonight
POSTED: Friday, August 28, 2009 - 6:48am
UPDATED: Wednesday, February 17, 2010 - 2:24pm
The launch of space shuttle discovery was delayed once again last night. Engineers asked to stop the countdown so they could review tests of a suspected problem with the valve of a fuel tank. That problem is what postponed Wednesday's liftoff. Tuesday's launch attempt was postponed by bad weather. The next launch opportunity is set for tonight at 9:59 mountain time.