People use a tractor while trying to break through police lines near the presidential administration building during a rally held by supporters of EU integration in Kiev, December 1, 2013. A group of protesters, attending a mass pro-Europe rally in the Ukrainian capital Kiev, on Sunday used a tractor to try to break through police lines near the headquarters of President Viktor Yanukovich, eyewitnesses said. Actially this day started the so-called "Euromaidan" in Ukraine - series of overmassive protests which resulted in fall of Yanukovich's regime and Russian annexion of Crimea later.