Sweeping restrictions on semiautomatic firearms move forward in Colorado / Gun laws: The Mark Mitchell-shaped mountain Nicole McKee has to climb on firearms reform / To stem domestic violence, federal government urged to move quickly on gun regulations / Gun-control group fears Liberals have 'abandoned' efforts on assault-style firearms / Instead of gun regulation, let's try innovation / Gun policy debate now includes retail tracking codes in California / Firearm-related deaths on the rise in U.S. amid surgeon general advisory / Chief enforcer of US gun laws fears Americans may become numb to violence with each mass shooting / Chief enforcer of U.S. gun laws fears Americans may become numb to violence with each mass shooting / Iraq's gun problem: Authorities seek to crack down on illegal firearms