U.S. Coast Guard Petty Officer 1st Class John Westbrook, a damage controlman aboard the Coast Guard Cutter Polar Star (WAGB 10), looks out at the San Francisco ferry building as the Polar Star transits the San Francisco Bay upon the cutter's return to the United States following the completion of Operation Deep Freeze 2024, March 31, 2024. Operation Deep Freeze is the annual logistical support mission provided by the Department of Defense to the National Science Foundation, managed by the U.S. Antarctic Program. (U.S. Coast Guard photo by Petty Officer 2nd Class Ryan Graves)