What does this mean? Wouldn't that start a war?
there have been incidents between american and russian air- and watercraft for a few months now. the russians instigate conflict over international airspaces and waters so as to avoid any diplomatic ramifications ("we're merely exercising our military," etc.)
putin invaded crimea a few years ago which could have started a war, but NATO backed out of it, so he's just continuing to push us to see how far he can get