WASHINGTON, DC — A gun control expert says the administration can help control drug violence in Mexico by enforcing already existing laws. Expert Tom Diaz says that imports of certain semiautomatic rifles were regulated under the first Bush and Clinton administrations. But he told a House panel Wednesday the import rules were relaxed under the most recent Bush administration. Diaz also says a 1930s gun law can be used to regulate imports of .50-caliber rifles also... (GunPolicy.org)