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The Polaris A-2 was a variant of the Polaris missile, which was the first U.S. submarine-launched ballistic missile (SLBM). Developed by the U.S. Navy, the Polaris A-2 had a range of 1,700 miles (2,700 km) and carried a one-megaton nuclear warhead. It was part of a series of Polaris models, including the A-1 and A-3, each with different ranges and warhead capabilities. These missiles were deployed on nuclear-powered submarines, forming a key part of the U.S. nuclear deterrent. The Polaris system was eventually replaced by the Poseidon missile in the U.S. fleet.12

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