Former gang member and drug addict Sergio Alvino gestures next to an image of the Virgin of Guadalupe in a low-income neighborhood in Monterrey March 24, 2011. In just four years, Monterrey, a manufacturing city of 4 million people 140 miles (230 km) from the Texan border, has gone from being a model for developing economies to a symbol of Mexico's drug war chaos, sucked down into a dark spiral of gangland killings, violent crime and growing lawlessness. By engulfing Monterrey, home to some of Latin America's biggest companies and where annual income per capita is double the Mexican average at $17,000, the violence shows just how serious the security crisis has become in Mexico, the world's seventh-largest oil exporter and a major U.S. trade partner. Picture taken March 24, 2011. To match Special Report MEXICO-DRUGS/MONTERREY REUTERS/Tomas Bravo (MEXICO - Tags: POLITICS SOCIETY CRIME LAW RELIGION CIVIL UNREST)