This is a claim that has been made about the Total Information Awareness program, its offshoots and, specifically, the NSA's big datacenter that was in the news

This is a claim that has been made about the Total Information Awareness program, its offshoots and, specifically, the NSA's big datacenter that was in the news some years ago: that one of the things the NSA are doing is collecting all the data they can in the hope they can make sense of it later, even I'd they can't now.