United States and other nations in the Arctic region. (2) Diminishing sea ice has made some Arctic waters navigable for longer periods and, as a result, may contribute to new economic opportunities in commercial shipping, resource extraction, tourism, and commercial fishing. (3) Arctic Region Policy, as outlined in National Security Presidential Directive–66 and Homeland Security Presidential Directive–25, states that [t]he United States has broad and fundamental national security interests in the Arctic region, including such matters as … deployment of sea and air systems for strategic sealift, strategic deterrence, maritime presence, and maritime security operations