CHICAGO (Reuters) - Chicago police, who have a reputation for dealing toughly with protesters, will be prepared for the worst with new riot gear, including "sound cannon", if demonstrators at the NATO summit get out of line this weekend. America's third-largest city and President Barack Obama's hometown has never hosted anything like the meeting starting on Sunday, which will draw representatives from some 50 countries, including leaders of the 28 members of the military alliance. ...

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