A regulator attached to a piece of SCUBA gear freezes over aboard the U.S. Coast Guard Cutter Polar Star (WAGB 10) in McMurdo Sound, Antarctica, Jan. 7, 2024. U.S. Coast Guard Cutter Polar Star (WAGB 10) is enroute to Antarctica in support of Operation Deep Freeze, a joint service, interagency support operation for the National Science Foundation, which manages the United States Antarctic Program. (U.S. Coast Guard photo by Petty Officer 2nd Class Ryan Graves)