This is claiming exactly the opposite of the previous point on U.S. demand for drugs; is not Mexican demand for guns as much to blame for guns in Mexico as U.S. supply? The US has put considerable effort into making sure that the Mexicans are able to counter cartels armed with guns with U.S. Army Special Forces soldiers training Mexican army commandoes. Similarly the Marine Corps also is working on an exchange program with the Mexican Marine Corps that will include sharing experiences on urban warfare. The US also arms the Mexican armed forces to prevent them being outgunned by the gangs. [1]  [1] Bowman, Tom, 'CIA And Pentagon Wonder: Could Mexico Implode?' NPR.