Foil means counteract. To say something is foiled means there has been an action to counter-act. What? Did the FBI counter-act its own action? We should give the FBI credit for devising a plot and then stopping its own plot? We should credit some inept terrorist for threatening to make a touchdown when he couldn’t get beyond the five-yard line without FBI counseling and guidance and without the FBI pointing out the goal line and supplying the football?