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U.S. Navy Sailors set I-type shoring onto a simulated structural casualty in a passageway during an evening general quarters drill aboard Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89) while underway in the Indian Ocean, May 18, 2026. Mustin is forward deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and U.S. 7th Fleet’s principal surface force. U.S. 7th Fleet, the Navy’s largest forward-deployed numbered fleet, routinely interacts and operates with allies and partners in preserving a free and open Indo-Pacific. (U.S. Navy photo by Mass Communication Specialist 2nd Class Timothy Dimal)