www.euronews.net Drug gangs in Mexico continue to defy the army's efforts to reduce violence. Mexico today is seeing death tolls higher than in the world's conventional warzones. In a new report, US analysis group STRATFOR says the Los Zetas cartel has become the most powerful. Founded by deserters from army special forces, Los Zetas also includes former police officers. It has gained supremacy through brutality. The latest regional report from Stratfor refers to coercion by "silver or lead" - meaning bribery or bullets.