From left, President Barack Obama, NATO Secretary General Anders Fogh Rasmussen, Afghan President Hamid Karzai, Azerbaijani President Ilham Aliyev and Pakistani President Asif Ali Zardari talk during a family picture of NATO leaders at the NATO Summit in Chicago, Monday, May 21, 2012. (AP Photo/Philippe Wojazer, Pool)

Photo by: Philippe Wojazer

From left, President Barack Obama, NATO Secretary General Anders Fogh Rasmussen, Afghan President Hamid Karzai, Azerbaijani President Ilham Aliyev and Pakistani President Asif Ali Zardari talk during a family picture of NATO leaders at the NATO Summit in Chicago, Monday, May 21, 2012. (AP Photo/Philippe Wojazer, Pool)