JOINT BASE PEARL HARBOR-HICKAM - Adm. Frank Caldwell, director of the Naval Nuclear Propulsion Program, left, speaks with leaders of the Pacific Submarine Force during a visit to Pearl Harbor, Hawaii. Caldwell, with Command Master Chief Frank Gardner, visited Pearl Harbor as part of a tour throughout the Pacific theater to review operations and build relationships in the region.

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: admiral, caldwell, frank, naval, nr, reactors