NATO leaders are gathering in Chicago for the annual summit, amid heavy protesting.
NATO Leaders Gather In Chicago
5
A demonstrator sits in a tree Grant Park before a march in Chicago, May 20, 2012.
6
A Chicago Police officer confronts a protester during a march and rally at this weekend's NATO summit.
7
German Chancellor Angela Merkel talks to President Obama at the Summit. At left is NATO Secretary General Anders Fogh Rasmussen.
8
Leaders pose for a family photo outside Soldier Field, May 20, 2012.