Whatewer happens, Russia wins.
Russia always losing with itself. The key to their victory as a nation, is far from Serbian borders.
THAT would be horrible defeat to USA nad NATO. Russian base on 20 minutes flight range to Aviano base?
Russian fighters and copters falling from the sky without enemy help, Russian subs become a joke, Russian army is unable to beat few dirty Chechens. Such a base would be indeed a catastrophe for NATO :-) Today Russian army is able eventually violate Estonian airspace, nothing more.