A leading gun control advocate says tougher laws are needed in the wake of a "machine gun shoot" that allowed an 8-year-old boy to pull the trigger on an Uzi, accidentally killing himself with a bullet to the head. John Rosenthal, founder of the nonprofit Stop Handgun Violence, considers the ability of gun clubs to hold machine gun shoots a "loophole" in the federal assault weapons ban that former Gov. Mitt Romney made permanent in the Bay State. "There ought to be a... (GunPolicy.org)