Actor James Arness, who protected the citizens of Dodge City as Marshal Matt Dillon for 20 years (1955-1975) on the TV series “Gunsmoke” has died of natural causes. He was 88. In an era when TV actors typically chewed the scenery, Arness had a credible, commanding presence by hardly uttering a word. A typical scene found a dozen cowboys riding up to the town jail intent on busting out a