Actor James Arness dies of natural causes
                                
                                
                                    (Newser) -
                                    One of Hollywood's greatest sheriffs, James Arness, died today of natural causes at his home, the  Los Angeles Times  reports. At 6-foot-7, Arness dominated TV screens as Marshal Matt Dillon on Gunsmoke, which ran from 1955 to 1975 and defined the TV Western. Arness had been wary about taking...