Tyson operates meat plants in Nebraska communities, including Omaha. Its plant in Lexington, Nebraska, is set to close in January. (Anna Moneymaker/ Getty Images) LINCOLN — In a blow to the local economy of Lexington, Nebraska, Tyson Foods announced that it is closing the town’s longtime Tyson beef plant that employed about 3,200 people.The Arkansas-based Tyson said in a statement th...