The crew of the Coast Guard Cutter Polar Star, a 399-foot Polar Icebreaker home-ported in Seattle, moors the ship at Vigor Shipyard in Seattle, Aug. 8, 2013. CGC Polar Star is one of the largest ships in the Coast Guard fleet and the world's most powerful non-nuclear ships. (U.S. Coast Guard photo by Petty Officer 2nd Class Zac Crawford)