Local government employees participate in a mandatory physical activity session at their office in downtown Mexico City August 14, 2013. The local government of Mexico City made it compulsory for all their civil servants to perform at least 20 minutes of exercise in their office to counter obesity. A United Nations report released last month put Mexico's obesity rate at 32.8 percent of adults, just above 31.8 percent in the United States, making Mexico the fattest country in the Western Hemisphere excluding Belize and some small Caribbean Islands. REUTERS/Tomas Bravo (MEXICO - Tags: POLITICS HEALTH SOCIETY)