Phoenix Bureau of Alcohol, Tobacco, Firearms & Explosives (ATF) agents hold a confiscated FN (Fabrique National) 5.7 mm semi-automatic pistol (foreground) and an AK-47 short pistol (background) at the bureau's headquarters in Phoenix, Arizona January 14, 2008. There has been an increase in these weapons being used by members of Mexican drug cartels, according to ATF special agent Tom Mangan. The guns are part of a recently confiscated shipment bound for Mexico. Photo taken January 14, 2008. Reuters Pictures 25 months ago

Phoenix Bureau of Alcohol, Tobacco, Firearms & Explosives (ATF) agents hold a confiscated FN (Fabrique National) 5.7 mm semi-automatic pistol (foreground) and an AK-47 short pistol (background) at the bureau's headquarters in Phoenix, Arizona January 14, 2008. There has been an increase in these weapons being used by members of Mexican drug cartels, according to ATF special agent Tom Mangan. The guns are part of a recently confiscated shipment bound for Mexico. Photo taken January 14, 2008.