I do not think they are using existing warrants. What there is, bu looking at EVERYTHING and being able to forensically looking at things, yu can see what was and was not used or done. That is essentially called auditing. I believe the audit process has been the most successful at the moment. Nothing substantial other than ACTIONS or REACTIONS based on things that are available to good people has really come out. Some stuff, like the aircraft crash over Roths… that is one thing accomplished or possibly talked about, as was the firecracker bomber, that was work of active intelligence gathering, and it's only potential because there were vagaries and other events that might "have applied" but were less interesting to us and applied to our thinking process. There is a huge danger to that if you study Intelligence gathering and the mirror effect.
I like where we are going or what we see for the most part, but I cannot and will not close my mind to other options. If we thought like that we wouldn't be here at all. We would have bought the party line before.