Photo by: Efrem Lukatsky Pro-Russian men throw stones during the mass storming of a police station in Horlivka, eastern Ukraine, Monday, April 14, 2014. Ukraine's acting President Oleksandr Turchynov on Monday called for the deployment of United Nations peacekeeping troops in the east of the country, where pro-Russian insurgents have occupied buildings in nearly 10 cities. (AP Photo/Efrem Lukatsky)