Nov. 22 (UPI) -- Tyson Foods is closing its Lexington, Neb., beef-processing plant to better position the food company for long-term success. Tyson announced the change on Friday and said the plan is to "right size" the food firm's beef business. The company also is downsizing its beef facility in Amarillo, Texas, to a single shift that will operate at full capacity, but production will rise at other Tyson facilities to meet customer demand for beef products. "Tyson Foods recognizes the impact