Move follows weeks of fighting in Sievierodonetsk
                                
                                
                                    (Newser) -
                                    After weeks of ferocious fighting, Ukrainian forces will retreat from a besieged city in the country's east to avoid encirclement, a regional governor said Friday. The city of Sievierodonetsk, the administrative center of the Luhansk region, has faced relentless Russian bombardment. Ukrainian troops fought the Russians in house-to-house battles...