Good night, Tom. An emotional Tom Brokaw, 64, signed off from the "NBC Nightly News" yesterday for the last time, thanking viewers of his top-rated evening newscast for watching him, his co-workers and especially "The Greatest Generation" of World War II veterans he has profiled so often in several books. "Whatever the story, I had only one objective — to get it right," he said in the closing moments of the broadcast as he recounted what he has learned after nearly 23 years in the anchor chair. "[The Greatest Generation] did not give up their personal beliefs and greatest...