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Northrop Grumman's RQ-8 Fire Scout UAV successfully test fires the second of two Mark 66 unguided rockets during weapons testing at Arizona's Yuma Proving Grounds July 22. Fire Scout fired the first 2.75-inch rocket earlier that day. The Fire Scout is being developed for use by the U.S. Navy and U.S. Army. Photo courtesy of Northrop Grumman.