By MARC SANTORA A Russian campaign to make Ukraine’s towns and cities unlivable is exacting an enormous toll on Ukrainian civilians. At least 30 people were killed Thursday when a Russian guided bomb struck a commuter bus in eastern Ukraine, officials said. That attack, in the front-line city of Kramatorsk, came a day after a Russian cruise missile slammed into a five-story apartment building in Pryluky, a small city about 200 miles from any active combat zone. At least 22 people, including…
