Violence along the U.S.-Mexico border continues to spiral upward, with all-too-frequent reports of bullet-ridden bodies turning up on street corners, in parks, on deserted highways, even at quinceaneras. A complex combination of drugs, corruption and poverty may be behind the bloodletting. But the source of the weapons used to kill is easily identified: The U.S. accounts for an estimated 85% of guns seized by Mexican authorities, according to a 2009 Government... (GunPolicy.org)