The all-out street war in Ukraine’s capital city of Kiev between anti-government protesters and security forces had its beginnings in late November, when President Viktor Yanukovych rejected a bid for closer integration of his country with the European Union. Protests began peacefully, but reports that security services used excessive force on demonstrators escalated the situation. As of Wednesday, dozens of people have been killed, including protesters and police officers, and hundreds injured. For years Yanukovych promised Ukrainians that he would sign an agreement with the EU, which would benefit Ukraine’s economy substantially. Protesters felt betrayed that he suddenly and without...