Discovery Delayed 2nd Time
By Will McCahill,  Newser Staff
Posted Aug 25, 2009 6:22 PM CDT
Astronaut John "Danny" Olivas is seen preparing to board Discovery yesterday.   (AP Photo)
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(Newser) – NASA called off another launch attempt for the shuttle Discovery, scheduled for early tomorrow, due to a broken valve in the craft’s liquid propellant system, Space.com reports tonight. It’s the second time the mission has been postponed in less than 24 hours: Storms early this morning forced the agency to scrub a planned launch just after 1:30am. Discovery must blast off by Sunday or wait until Oct. 17.