You have the FBI making criminals from scratch and then stopping them before they can carry out an attack. They give them duds to reduce the risk further. This is then used to justify their existence. Thankfully we have mountains of evidence that no plots by three letter agencies ever get out of hand.
Or going forward with the attack and then ask for bigger budget to be allocated to them to avoid future "unfortunate" occurrences and to reward their incompetence & treason a win-win-win.