NEW YORK — NFL greats Emmitt Smith, Deion Sanders, Michael Irvin, LaDainian Tomlinson and Marshall Faulk are appearing in a public service announcement in favor of gun law reforms. The spot released Friday is paid for by Mayors Against Illegal Guns, which was founded by New York City's Michael Bloomberg and Boston's Thomas Menino. A solemn Smith speaks into the camera: "For the children of Sandy Hook Elementary." ...