HOUSTON — A four-month effort to stop the flow of firearms from the U.S. to Mexican drug cartels has helped law enforcement disrupt various gun trafficking rings and gain a better understanding of how these groups try to avoid detection, officials announced Thursday. Many weapons seized south of the border are traced back to Houston, where 100 agents with the Bureau of Alcohol, Tobacco, Firearms and Explosives and other personnel were deployed in April to develop... (GunPolicy.org)