Guns bought in one state often end up being used in crimes in another state, and a coalition of the nation's mayors thinks tougher laws could reverse that trend. More than 2,600 of those guns traced to crimes last year originated in Florida. That's second only to Georgia. Mayors Against Illegal Guns has singled out 10 laws that, if passed, will deter gun trafficking. "Our report reveals that states with weak gun laws are the top sources of guns recovered in... (GunPolicy.org)