Capt. Michael Davanzo, commanding officer of the Coast Guard Cutter Polar Star, talks with Lt. j.g. Sam Krackower from the floor of the dry dock where the cutter is undergoing depot-level maintenance in Vallejo, Calif., in preparation for the cutter’s future polar-region patrol, April 16, 2018. As activity in the Polar Regions continues to grow the Coast Guard continues to maintain their aging icebreaking assets to protect U.S. security, environmental, and economic interests in the polar regions. U.S. Coast Guard photo by Petty Officer 1st Class Matthew S. Masaschi.