High Quality Content by WIKIPEDIA articles! The 2012 Chicago Summit is a meeting of the heads of state and heads of government of the North Atlantic Treaty Organization, held in Chicago, Illinois, on 20 and 21 May 2012. This is the first time ever that a NATO summit has been held in the United States outside of the nation`s capital, Washington, D.C. The event was originally scheduled to coincide and be held after the 2012 G8 summit in Chicago as well, but the G8 summit was later rescheduled to be held at Camp David.