That whole watch list tihing is just for plausable denialability for thd lame FBI and Jeh!.
Every one of the terrorists from the Boston Bombers to San Bernardino have been known by the feds. It is sickening nothing was done to eliminate the threat. This is yet another broken department/s Trump is going to have to fix. Trump is going to need more than 8 years to fix all the damage done over the past decades.