The expected space shuttle launch on Saturday was postponed for Discovery and its seven member crew due to storm clouds.
NASA will try to lift off Sunday from the Kennedy Space Center at 2:49 in the afternoon.
If the weather continues to be unpredictable this holiday weekend NASA will continue to launch until July 19th.
Discovery is on on a 12 day mission to the International Space Station where it will deliver supplies.
This launch would be only the second shuttle flight since the Columbia tragedy in 2003.
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