Gangster warlords are now dominant players in Mexico and other countries south of the border. "The collapse of military dictatorships and guerrilla armies left stockpiles of weapons and soldiers searching for new payrolls." That's according to Ioan Grillo, investigative reporter and author of the new book Gangster Warlords: Drug Dollars, Killing Fields and the New Politics of Latin America. Grillo discusses how crime goes together with politics and culture.