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    Watch Atlas V rocket launch

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Watch Atlas V rocket launch

A United Launch Alliance Atlas V 551 launches the U.S. Navy's fourth Mobile User Objective System (MUOS-4) satellite, built by Lockheed Martin.

Watch Atlas V rocket launch

A United Launch Alliance Atlas V 551 launches the U.S. Navy's fourth Mobile User Objective System (MUOS-4) satellite, built by Lockheed Martin.