Article Photos: NATO shifts to help an elusive Afghanistan peace 3/16

  A plane takes off from Chicago O'Hare International Airport in between the arrival of world leaders attending the NATO Summit, on Saturday, May 19, 2012, 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/Seth Perlman)