Nato protesters are reflected in a Chicago police officers sunglasses during a march in Daley Plaza, in Chicago. Security has been high throughout the city in preparation for the NATO summit, where delegations from about 60 countries will discuss the war in Afghanistan and European missile defense. AP Photo/M Spencer Green
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Chicago Occupy Wall Street Protesters march through the streets of downtown Chicago, Illinois, on the eve of the Nato summit. After a decade in Afghanistan, Nato leaders gather for a key summit, hoping for a show of unity in the final two years of combat -- even though allies are eager to bring troops home. AFP Photo / Saul Loeb
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Italian minister of foreign affairs Giulio Terzi di Sant Agata arrives at Chicago O'Hare International Airport to attend the Nato Summit in Chicago. Security has been high throughout the city in preparation for the summit, where delegations from about 60 countries will discuss the war in Afghanistan and European missile defense. AP Photo/Seth Perlman
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Military personnel keep watch over arrivals at O'Hare International Airport before the start of the Nato summit in Chicago. The two-day summit which starts May 20 will draw representatives from some 50 countries, including leaders of the 28 members of the military alliance. Reuters/Jeff Haynes
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This photo shows the Chicago skyline at night. Security has been high throughout the city in preparation for the Nato summit, where delegations from about 60 countries will discuss the war in Afghanistan and European missile defense. AP Photo/Pablo Martinez Monsivais
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President Barack Obama and first lady Michelle Obama arrive at Chicago O’Hare International airport in Chicago. Obama travelled to Chicago to host the two-day Nato summit. AP Photo/Pablo Martinez Monsivais
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A bleeding anti-Nato protestor is comforted after a scuffle with police during a march, in Chicago. On Sunday, the start of the two-day NATO summit, thousands of protesters are expected to march to the McCormick Place convention center, where Nato delegates will be meeting. AP Photo/John Minchillo
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A demonstrator yells during a protest before the start of a Nato summit in Chicago. Hundreds of demonstrators protested peacefully on Saturday on the eve of the Nato summit in Chicago, gathering outside Mayor Rahm Emanuel's home to criticize cuts in mental health services before moving downtown under the close eye of police. Reuters/Eric Thayer
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Police try to keep demonstrators from breaking through their lines durijng a march through the downtown streets in Chicago, Illinois. This was the sixth day of protests in front of the Nato Summit which runs May 20-21. Scott Olson/Getty Images/AFP
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Police in riot gear stand at the ready outside the downtown Hilton Hotel as protestors demonstrate in the street nearby in Chicago, Illinois. This was the sixth day of protests in front of the Nato Summit which runs May 20-21. Scott Olson/Getty Images/AFP
