“Between the never ending conflict in Ukraine, the crisis in Syria and now allegations that Russia has engaged in cyber hacking against America, relations between Moscow and Washington have reached a low not seen since the darkest days of the Cold War. And to make matters even worse, with NATO and Russian forces in close proximity in Europe-as recent events keep demonstrating–as well as both nations having air assets over the war torn skies of the Syrian Civil War, there is the chance that an accidental collision could spark a diplomatic crisis, a crisis that could lead to a place no one wants to go: some sort of open conflict.”
Source: These are the 10 Killer Weapons Russia and America Would Use in a War | The National Interest Blog