United Launch Alliance is rolling the Atlas V rocket carrying the U.S. Air Force’s second Wideband Global Satcom (WGS-2) spacecraft back from Launch Complex 41 to its integration building at Cape Canaveral this afternoon, where technicians will attempt to determine the cause of the upper-stage liquid oxygen leak that resulted in the scrubbing of Tuesday night’s launch attempt. The oxidizer valve leak was discovered during fueling of the Centaur upper stage at about 7:45 p.m. EDT, in ...

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