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From 2nd L-R: President of Lithuania Dalia Grybauskaite, Minister of Foreign Affairs of Luxembourg Jean Asselborn, Prime Minister of Luxembourg Jean-Claude Juncker and Prime Minister of The Netherlands Mark Rutte attend the North Atlantic Council meeting with Heads of Sate and Government in Chicago, Illinois, during the NATO 2012 Summit in this picture taken May 20, 2012. REUTERS/eric Efferberg/Pool (UNITED STATES – Tags: POLITICS)

Portugal’s prime minister Pedro Passos Coelho speaks at a news conference during the NATO Summit in Chicago, Monday, May 21, 2012. (AP Photo/Kiichiro Sato)

President Barack Obama boards Air Force One during his departure from O’Hare International airport in Chicago, Monday, May 21, 2012. (AP Photo/Pablo Martinez Monsivais)

Romanian President Traian Basescu speaks at a news conference during the NATO Summit in Chicago, Monday, May 21, 2012. (AP Photo/Kiichiro Sato)