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Identifying whos behind this. i dont want you in public to get into details that you cant share, but i just wonder what you can say about what gives you that confidence and what has turned in the last number of hours, because as poppy was saying earlier, yesterday, we were hearing no hard leads, but now the language coming from law enforcement and yourself has changed. what can you tell us? >> well, every time there is a package sent, you have a new piece of evidence, right? and the fbis ability...