Capt. George Pellissier, commanding officer, Coast Guard Cutter Polar Star, explains the operational capabilities of the icebreaker to a group of partner agency and local visitors aboard the cutter in Juneau, Alaska, Aug. 3, 2013. The 399-foot Polar Star is the nation's only heavy icebreaker and serves as an important asset to future polar missions. U.S. Coast Guard photo by Petty Officer 3rd Class Grant DeVuyst.