Military Hardware: Tanks, Bombers, Submarines and More The U.S. Navy’s Last Line of Defense Is an Autonomous Gun That Thinks for Itself — and the Fleet Nicknamed It ‘R2-D2’ Summary and Key Points: It looks almost comical — a squat white dome sailors nicknamed “R2-D2.” But the Phalanx is one of the deadliest... Steve Balestrieri2 hours ago