Official describes network of tunnels allegedly used by Guzman . Joaquin ` ` El Chapo '' Guzman is longtime boss of powerful drug trafficking operations . Guzman has been included in Forbes ' World 's Most Powerful People list . DEA veteran : Inside the drug war . ` The Sinaloa Cartel was created to protect the interests of Mexico's largest cartel, Los Zetas, which had become a major threat to Guzman's organization and his own safety.
Official describes network of tunnels allegedly used by Guzman . Joaquin ` ` El Chapo '' Guzman is longtime boss of powerful drug trafficking operations . Guzman has been included in Forbes ' World 's Most Powerful People list . DEA veteran : ` The Sinaloa Cartel was created to protect the interests of Mexico's largest cartel, Los Zetas, which had become a major threat to Guzman's organization and his own safety.