A pod of Orca whales swims past the bow of the Coast Guard Cutter Polar Star while the ship's crew grooms a channel in the fast ice near the National Science Foundation's McMurdo Station, Antarctica, Feb. 1, 2015. Polar Star's crew is underway in support of Operation Deep Freeze 2015, part of the U.S. Antarctic program, managed by the NSF. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)