People working in the building that houses the re-election headquarters of U.S. President Barack Obama watch as Occupy Chicago protestors gather outside in Chicago

 
People working in the building that houses the re-election headquarters of U.S. President Barack Obama watch as Occupy Chicago protestors gather outside in Chicago
People working in the building that houses the re-election headquarters of U.S. President Barack Obama watch as Occupy Chicago protestors gather outside in Chicago May 21, 2012. Chicago is hosting the world leaders meeting at the NATO Summit which runs from May 20-21. REUTERS/Frank Polich (UNITED STATES - Tags: POLITICS CIVIL UNREST)