text:  Evacuations are underway now near Chicago, where officials say a train has derailed in Madison. No one was hurt, but fire crews are checking each freight car now for chemical leaks. Meantime, airports are already busy with July 4th holiday travelers. This woman's at Logan in Boston. It definitely is busier than that's the first thing we said when we were getting off the escalator, so definitely a little busier than usual, but.