Pro-Russian separatist walks past a destroyed tank at Savur-Mohyla, a hill east of the city of Donetsk

A Pro-Russian separatist walks past a destroyed tank at Savur-Mohyla, a hill east of the city of Donetsk, August 28, 2014. Ukrainian President Petro Poroshenko said on Thursday that Russian forces had entered his country and the military conflict was worsening after Russian-backed separatists swept into a key town in the east. REUTERS/Maxim Shemetov (UKRAINE – Tags: POLITICS MILITARY CIVIL UNREST CONFLICT)