Italy's Prime Minister Mario Monti arrives at O'Hare International Airport before the start of the NATO summit in Chicago May 19, 2012. 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. [Photo/Agencies]
French President Francois Hollande arrives at O'Hare International Airport before the start of the NATO summit in Chicago May 19, 2012. [Photo/Agencies]