Poland and Russia fans fought it out on the streets before today’s Euro 2012 football match. Police fired off water cannons and tear gas to help break up the dozens of fighting hooligans. Over a 100 unruly Polish/Russian fans were treated for injuries – brought about by centuries of bad blood, age-old football rivalry, and lots and lots of vodka. Trouble began when Russian began marching to the National Stadium across a central Warsaw bridge chanting “Russia, Russia” and waving white, blue and red Russian flags. When Polish fans yelled obscenities at the Russian marchers, they responded by hurling bottles. (Though, less violent than the Soviet invasion of Poland in 1939.) Hooligans on both sides have a bad reputation for violence, as the stadium was encircled by a thick gauntlet of riot police with dogs and rubber-bullet guns.