Once Again,Big Ears NSA has Proven Useless

An early warning of this serious threat was picked up by NSA, the source said.

So the overpaid and worthless NSA had prior credible warning and could not (would not ?) stop this attack.
WHAT GOOD ARE THEY ?
The idiots are too busy spying on the wrong people and flooding the country with al Shabab friendly Somali's and other assorted .Islamic terrorists.