For months now, NSA defenders have argued repeatedly that the bulk metadata programs were necessary to stop terrorist attacks. For a while they were throwing around the claim of „54 thwarted terrorist events“ which some (falsely) pretended meant 54 thwarted attacks. However, the numbers have been debunked repeatedly by people looking into them. Multiple Senators have debunked the idea that the bulk metadata collection was useful. Senator Patrick Leahy said that his own review of a classified list of what the program was necessary for did not show that it was used to thwart terrorist attacks. Separately, Senators Ron Wyden, Mark Udall and Martin Heinrich went so far as to file an amicus brief stating that they‘ve yet to see any evidence that the program has been useful.