Moscow and Washington have started to cooperate in the skies over Syria as Russian and US aircraft have conducted a joint exercise on the actions in case of a near collision over the war-torn country. Russian and US jets have practiced a close approach to a minimally safe distance of 5.5 kilometers, he added. "Today at 11 a.m. Moscow time, Russian and US air forces carried out joint drills on actions by crews and land personnel in cases when aircraft fly in close proximity to each other," Kartapolov said. "During the drills in a specially designated zone, the crews of Russian and international [US-led] coalition planes maneuvered to a safe distance of 3 nautical miles from each other, established radio contacts on a designated frequency, and exchanged messages about parameters of their flights in Russian and English."
I dont think i like where this is going.
Source: http://sputniknews.com/middleeast/20151103/1029540546/russian-airstrikes-syria-2000-terrorist-targets.html#ixzz3qRaehyU2