Discovery scheduled to launch Sunday

June 22, 2009 1:29:58 PM PDT
Space Shuttle Discovery will get another chance to blast off Sunday night.[SIGN UP: Get headlines and breaking news sent to you]

NASA said engineers fixed the hydrogen gas leak that postponed Wednesday's launch. The space agency still isn't sure what caused the leak, but several parts were replaced.

A series of delays has made Discovery a month late for its mission to deliver a final set of solar wings to the space station. The launch is now set for 6:43pm Sunday evening.

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