McDonald's is extending its operating hours at most U.S. locations starting this summer amid an earlier decision to hire more than 300,000 workers. The fast food chain will keep stores open until midnight or later, although restaurants in airports, shopping malls or other areas that prohibit extended operating hours are excluded from the change."Our fans know there’s no better way to end an unforgettable night than by feasting on your favorite McDonald’s order," the company said in a statement to USA TODAY. ...