Remaining on duty overnight volunteers warm themselves at a bonfire at a Pro-European Union's tent camp in the Independence Square in Kiev, Ukraine, Saturday, Dec. 14, 2013. The opposition has called for a vast turnout Sunday. Rallies on the previous two Sundays drew hundreds of thousands of protesters. That same day, Yanukovych's Party of Regions has called for a pro-government demonstration that it claims will bring 200,000 people to Kiev. (AP Photo/Alexander Zemlianichenko)