POLAR CHALLENGE The Coast Guard Cutter Healy breaks ice around Renda, a Russian-flagged tanker, 250 miles south of Nome, Alaska, Jan. 6, 2012. Healy is the Coast Guard's only operating polar icebreaker. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 174380-E-WZG09-593.jpg Photo Gallery