FILE – In this Dec. 10, 2012 file photo, Enrique Pena Nieto speaks during an interview at the Los Pinos presidential residence in Mexico City. A top aide says the Wednesday, July 31, 2013 surgery on the Mexican leader to remove a thyroid nodule went smoothly and exactly as planned. Chief-of-Staff Aurelio Nuno says Pena Nieto is awake and has returned to his room in the Central Military Hospital. (AP Photo/Dario Lopez-Mills, File)
