By Natalia Zinets and Conor Humphries LVIV, Ukraine/DUBLIN (Reuters) – Russian forces bombarded cities in Ukraine as the United States imposed more sanctions on Wednesday after civilian killings widely condemned as war crimes and Ukraine’s President urged a decisive Western response amid divisions in Europe. Russia’s 42-day-long invasion has forced more than 4 million people to flee abroad, killed or injured thousands, left a quarter of the population homeless, turned entire cities into rubble and prompted a slew of Western restrictions on Russian elites and the economy. The new measures annou…