Andrew Shapiro talks with former Pentagon Arctic policy head Iris Ferguson about how melting sea ice is ushering in a new era of great power competition, ending decades of 'Arctic exceptionalism.' Iris, the DOD's first Deputy Assistant Secretary for the Arctic, discusses Russia's interests, China's pursuit of influence as a 'near-Arctic state,' and the US imperative to bolster homeland defense, domain awareness, and alliances from Greenland to Alaska.