A protester wearing a Guy Fawkes mask and a Mexican flag participates in a march in Mexico City September 1, 2013. Thousands of protesters took to the streets against the government of President Enrique Pena Nieto who has pinned his hopes of ramping up lackluster growth in Latin America's second largest economy on attracting more investment into the oil industry, and improving Mexico's meager tax revenues. REUTERS/Henry Romero (MEXICO - Tags: POLITICS CIVIL UNREST ENERGY BUSINESS)