The book analyses the renewed importance of the North Atlantic for NATO in the face of new security challenges This Whitehall Paper explores the renewed importance of the North Atlantic Ocean to NATO’s security through the lenses of the United States, United Kingdom and Norway in particular. These three NATO members form the territorial rim around the North Atlantic and its peripheral seas. All are maritime nations that have historically taken prime responsibility for security in the region and together with Iceland they form the front line to a resurgent Russian maritime capability. These three counties, with support from the rest of the northern region, must take the lead to ensure that NATO and its partners devote sufficient resources to this aspect of NATO’s area of responsibility.