Shown is the bow of U.S. Coast Guard Cutter Polar Star (WAGB 10) while breaking ice in Antarctica, Jan. 4, 2022. The nearly 50-year-old ice breaker is American's sole heavy icebreakers as well as the world's most powerful, nonnuclear ice breaker. (U.S. Coast Guard photo by Petty Officer 3rd Class Diolanda Caballero)