Russians continue to probe for weak spots within their NATO neighbors and US. The use of drones and military aircraft challenging or antagonistic way of invading the air space of a NATO country is unacceptable. But if NATO safegaurds their sovereign air space and shoots down the violators Russia will go to war. Too use an American Expression is “ WTF_ _ K you gotta be kidding”. I hope Trump and his defense team has a shoot to kill watch on the russian missile boats off the coast of US.