 Since 2011, much of the drug-related violence is a result of the turf wars between Los Zetas and the Sinaloa Cartel, a drug trafficking organization based in western Mexico and headed by Joaquín "El Chapo" Guzmán, Mexico's most-wanted drug lord.These criminal groups are fighting for Veracruz because of its lucrative smuggling routes for contraband, drug trafficking, and illegal migrants heading to the United States.It has one of Mexico's busiest ports, and officials say that there is no way they can inspect all of the containers that come in by ship.