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Demonstrators covered in an oily substance conduct a die-in as they protest against the Keystone Pipeline and Alberta Tar Sands development on May 17 in Chicago. This was the fourth day of protests in what is expected to be a full week of demonstrations as the city prepares to host the NATO Summit May 20-21.
Some downtown Chicago businesses are taking extra steps for security, including boarding up ahead of expected anti-NATO protests. WMAQ's Jeff Goldblatt reports.