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The second-longest-running show in primetime television is about to change channels. Monday Night Football started back in 1970 on ABC. Since then, it's become a cultural touchstone, consistently ranking in the top ten during football season -- great for business for both ABC and the NFL. But this coming Monday the New York Jets will play the New England Patriots in the final Monday night game on ABC. Marketplace's Tess Vigeland took a look at the end of an era.