Delta IV Cleared For WGS Mission While Engine Probe Continues

U.S. Air Force officials are confident that the RL10B-2 upper-stage engine for the Delta IV rocket, which has been grounded since an anomaly last fall, will perform nominally in boosting the fifth Wideband Global Satcom (WGS) satellite May 22 from Cape Canaveral, Fla. Air Force Space Command chief...

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