Armin Rosen Febuary 5, 2016Russia's submarine fleet is more active than it's been in decades in a strategically vital body of water — and US military planners can't seem to figure out why. US Navy Vice Admiral Clive Johnstone, also head of NATO's maritime command, told IHS Jane's that the US has seen "more activity from Russian submarines than we've seen since the days of the Cold War" in the North Atlantic. While Johnstone didn't specify which parts of the North Atlantic have seen this uptick, nearly the entirety of the area between North America, the Western European coastline, and...