Petty Officer 3rd Class Mitchell Irwin, a machinery technician on Coast Guard Cutter Polar Star (WAGB 10), kneels to take a photo on the fast ice during ice liberty in the McMurdo Sound, Antarctica, Jan. 2, 2023. Irwin deployed in support of Operation Deep Freeze 2023, one of the more challenging U.S. military peacetime missions due to the harsh environment in which it is conducted. (U.S. Coast Guard photo by Petty Officer 3rd Class Aidan Cooney)