"The diminishment of Arctic sea ice has led to increased human activities in the Arctic, and has heightened interest in, and concerns about, the region's future. The United States, by virtue of Alaska, is an Arctic country and has substantial interests in the region. On January 21, 2015, President Obama issued an executive order for enhancing coordination of national efforts in the Arctic. The United States assumed the chairmanship of the Arctic Council on April 24, 2015, and will serve in that capacity for two years. [...] Although there is significant international cooperation on Arctic issues, the Arctic is increasingly being viewed by some observers as a potential emerging security issue. Some of the Arctic coastal states, particularly Russia, have announced an intention or taken actions to enhance their military presences in the high north. U.S. military forces, particularly the Navy and Coast Guard, have begun to pay more attention to the region in their planning and operations."
CRS Report for Congress, R41153
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html