FBI wants to move hunt for criminals into Internet backbone

But while Fusion Centers centralize law enforcement efforts, they do not centralize the criminal activity. There are places, however, where such activity is centralized: the backbone hubs located in hosting facilities across the country. All of the Internet's activity, legal and illegal, flows through these "choke points," and the feds, of course, are already tapping those points and siphoning off data.
What Mueller wants is the legal authority to comb through the backbone data that is already being siphoned off by the NSA in order to look for illegal activity.
I want to point out that this centralization of legal and illegal activity at network hubs will be a persistent part of all of our lives as we live more and more of them online. Thus the government's desire to tap those hubs and filter them for criminal and hostile activity will never go away.