A man in unmarked uniform and wearing a mask holds a gun as he climbs aboard the Ukrainian corvette Khmelnitsky in Sevastopol, Crimea, Thursday, March 20, 2014. Pro-Russian crowds seized two Ukrainian warships Thursday. Shots were fired but there were no casualties as the Ukrainian corvette Khmelnitsky was seized in Sevastopol. Another ship, the Lutsk, was also surrounded by pro-Russian forces.