CAPE CANAVERAL—United Launch Alliance (ULA) is delaying a pair of upcoming U.S. military space launch missions to address a potential problem with an undisclosed component in the boosters’ upper stages. The company, a joint venture of Lockheed Martin and Boeing, said July 17 that the upcoming launch of a Delta IV rocket with a GPS III satellite will be retargeted for no earlier than Aug. 22 to allow time for technicians to replace and retest a faulty component. The problem was ...

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