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GOOSE CREEK, SC (July 7, 2023) Adm. James F. Caldwell Jr., director, Naval Nuclear Propulsion Program, speaks during a United States Naval Nuclear Power School (NPS) graduation ceremony Naval Nuclear Power Training Command (NNPTC), July 7, 2023. Three Royal Australian Navy (RAN) officers graduated NPS, marking a significant step in Australia's goal to operate conventionally-armed, nuclear-powered attack submarines (SSNs). (U.S. Navy photo by Mass Communication Specialist 2nd Class Dart D. De La Garza/RELEASED)