2005 – Mexico sees a surge in gang related violence, particularly because of increased fighting between Gulf and Sinaloa cartels, as well as the rise of the Familia Michoacana cartel. Drug cartels in Mexico control approximately 70 percent of the foreign narcotics flow into the United States. (Photo: The Mexican army patrols Matamoros city on the border with the U.S. as part of a national crusade against drug trafficking, Jan. 27, 2005. The city is the main base of the Gulf cartel.)