Former heavyweight champion Vitali Klitschko, the leader of the UDAR (Punch) political party in Ukraine, tried his best to stop fighting between police and protesters during an opposition rally in the Ukrainian capital of Kiev. Klitschko, one of the key figures in the protest, is standing side by side with 200,000 protesters who are expressing their frustration over the government's ditching of a pact with the EU under Russian pressure. Klitschko, who plans to run for president, has been part of the protests for the last two months.