Ultimately, it’s impossible to know just how successful sweeping surveillance has been, since much of the work is secret. But what has been disclosed so far suggests the programs have been of limited value. Here’s a roundup of what we know.
Ultimately, it’s impossible to know just how successful sweeping surveillance has been, since much of the work is secret. But what has been disclosed so far suggests the programs have been of limited value. Here’s a roundup of what we know.