Five years. Is it enough time to begin moving on? A widow's bed still feels empty, but she can balance the checkbook. She can function without him. In some ways. Is it enough time for the physical scars to mend? A crater remains where the towers soared, but the hum of construction promises new life, one day, in the void. Time heals, or so the saying goes. But when the hurt is so great, so unlike anything we've ever known, how much time does it take? And how much change does that time bring, to us as a nation and...