U.S. Coast Guard Petty Officer 3rd Class Luis Dueno Diaz, a crew member aboard USCGC Polar Star (WAGB 10), reacts to a toxic gas drill during Operation Deep Freeze 2026 while patrolling the Pacific Ocean, Dec. 4, 2025. The cutter deployed in support of a joint service, inter-agency support operation for the National Science Foundation, which manages the United States Antarctic Program. (U.S. Coast Guard photo by Petty Officer 3rd Class Christopher Bokum)