BAKCHISARAY, Ukraine (Reuters) - Bearded men in camouflage uniforms and black fur hats and armed with knives, were checking traffic on Thursday along the busy road linking Crimea’s regional capital of Simferopol and the naval port of Sevastopol. Bratislav Zivkovic, a member of a Serbian Chetnik paramilitary group, mans a checkpoint on the highway between Simferopol and Sevastopol in the Crimean pe