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    Demonstrators make their way towards Michigan Ave. during a protest march as a part of this weekend's NATO summit in Chicago Sunday, May 20, 2012 in Chicago. (AP Photo/Kim Johnson Flodin)

    Protesters swarm on final day of NATO summit

    Demonstrators launched another round of protests May 21 in the final hours of the NATO summit, marching through an unusually quiet downtown Chicago to the headquarters of Boeing and President Barack Obama's campaign.