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, after breaking a channel and turning basin in the ice of McMurdo Sound, 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 Seaman Clayton Burnett)