How the US Arms the Mexican Drug Cartels / / No Comments There are only two gun stores in Mexico, and both are located on military bases. Yet the country still suffers from a major gun homicide problem. So where are the guns coming from?In 2015, a Mexican military helicopter was shot down by cartel fighters using a Browning machine gun and a Barrett .50-caliber rifle. Both weapons were traced back to legal purchases in U.S. gun shops. This stark Maps Mania… more → Posted in: Interactive Maps Tagged with: Arms, Cartels, Drug, Mexican