This undated product image provided by McDonald’s shows the fast food chain’s new trio of “Sirloin Third Pound” burgers: the Steakhouse, foreground right, Lettuce & Tomato, left, and Bacon & Cheese. McDonald’s says it’s introducing the burgers for a limited time starting later this month, the latest sign the chain is pushing to improve perceptions about the quality of its food. (AP Photo/McDonald’s)