Here's one surprising reason Russia might not want to pick a fight with US planes over Syria

The skies over Syria are dangerously crowded these days with the US, Russia, and the Assad regime all bombing various actors on vaguely opposite sides of the country's multidimensional conflict. In both Iraq and Syria, the reality of overlapping aerial operations among countries with little geopolitical fondness toward one another has already led to claims that British aircraft have been authorized to engage Russian aircraft over Iraq if threatened.

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