Image provided by Mexico's Presidency shows Mexican President, Enrique Pena Nieto (front), delivering a speech at the end of the Fifth Race Molino del Rey 2015, at Chapultepec Park, in Mexico City, capital of Mexico, on Aug. 15, 2015. Within 50 days of being involved in a gallbladder operation, Enrique Pena Nieto participated on Saturday's "Molino del Rey" race, organized by the Presidential Guard. (Xinhua/Mexico's Presidency)
