U.S. Coast Guard Petty Officer 1st Class Joshua Tangermann and Petty Officer 2nd Class Harrison Bauer, boatswain’s mates, lower themselves into the water while practicing ice rescue techniques in McMurdo Sound, Antarctica, Dec. 29, 2023. Operation Deep Freeze is one of many operations in the Indo-Pacific in which the U.S. military promotes security and stability across the region. (U.S. Coast Guard photo by Petty Officer 3rd Class Ryan Graves)