Senator Mario Delgado (C) of the Party of the Democratic Revolution (PRD) gives a speech during a debate on an energy reform bill at the Senate in Mexico City December 10, 2013. Mexico's Senate on Tuesday moved a step closer to passing reforms to open up the country's oil industry to private investment, sending a draft bill to the floor of the upper chamber to speed up the approval process. REUTERS/Henry Romero (MEXICO - Tags: POLITICS ENERGY BUSINESS)