WASHINGTON - The U.S. gun industry on Wednesday sued to block requirements that weapons dealers along the border with Mexico report multiple sales of semi-automatic rifles, escalating the fight with the Obama administration. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) last month ordered more than 8,000 gun dealers in Texas, Arizona, New Mexico and California to report such sales to try to stem the "iron river" of guns flowing to violent Mexican drug... (GunPolicy.org)