With truly staggering recklessness, NATO is deploying warships and warplanes to the Arctic, Baltic, and Black Seas surrounding Russia. This creates a situation where minor navigational miscalculations could lead to the sinking of a US warship, a US missile strike on Russian soil, followed by an escalation of conflict into war between powers whose nuclear arsenals are capable of destroying the world many times over.

http://www.wsws.org/en/articles/2015/06/01/russ-j01.html