The Coast Guard Cutter Polar Star, a heavy icebreaker homeported in Seattle, sits moored at the ice pier at the National Science Foundation's McMurdo Station, Antarctica, Jan. 18, 2015. Polar Star's crew is in Antarctica supporting Operation Deep Freeze, part of the U.S. Antarctic Program, managed by the National Science Foundation. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)