Opposition leader and former WBC heavyweight boxing champion Vitali Klitschko, center, addresses protesters near the burning barricades between police and protesters in central Kiev, Ukraine, Thursday Jan. 23, 2014.  Klitschko dove behind the wall of black smoke engulfing much of downtown Kiev on Thursday, pleading with both police and protesters to uphold the peace until the ultimatum, demanding that Yanukovych dismiss the government, call early elections and scrap harsh anti-protest legislation that triggered the violence. (AP Photo/Sergei Chuzavkov)
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