Former U.S. Vice President Al Gore snacks on the trail mix he filled his cheeks with during a news conference at the presidential residence, Los Pinos, in Mexico City July 31, 2007. REUTERS/Henry Romero (MEXICO) Gore attempts his reverse ventriloquist act with Mexico's President Felipe Calderon at the presidential residence, Los Pinos, in Mexico City July 31, 2007. REUTERS/Henry Romero (MEXICO) U.S. Former Vice President Al Gore demonstrates to an enthralled audience how he can catapult Jolly Ranchers into his open mouth while lecturing on the climate crisis. Gore is in Mexico invited by the Mexico City municipality to...