Pakistani President Asif Ali Zardari was conspicuously absent from the photo session of leaders of about 60 nations who participated in NATO Summit in Chicago on Afghanistan.

The meeting was attended not only by leaders of NATO nations but also those contributing troops to International Security Assistance Force.

No immediate reason was given for the absence of Zardari from the photo session, in which all the leaders participated.

Image: Official portrait of NATO Heads of State and government at Soldier Field on the occasion of the NATO Chicago Summit.

Photograph: NATO