The U.S. Navy conducted the first successful test flight of the service’s Trident II D5 fleet ballistic missiles with modernized avionics subsystems that control key missile functions during flight, missile maker Lockheed Martin says. The two tests, conducted earlier this month, also set a reliability record, with 150 successful test flights for the large ballistic missiles, Lockheed says. The Navy launched two unarmed missiles June 2 in the Atlantic Ocean from a submerged Ohio-class ...


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