Hopefully this has already been foiled. It's the attack plans we DON'T know about that worry me the most.
If we know about it, we can most likely stop it.
I understand.
OPINION: Evil hates being spotlighted by lights and sirens. This attack MAY have been prevented by shining the light and raising the alarm on this specific threat.
As for all the rest of the threats...
TERRORISM IS GLOBAL.
TERRORISTS ARE GLOBAL.
Jihad -- another day.