How come we have a DNA library on every stray Tango on the planet?
All I have is speculation; if I were the terrorists, I would be very, very afraid, and taking up another line of work would probably be very tempting about now.
For those that don't understand why killing someone 8 years later is such a big deal: we have to send a message to the world. "Mess with the US, and it doesn't matter how long it takes or what we have to do - eventually we *will* find you and we *will* kill you."
That is the new MAD, one that *will* reduce terrorist events against the US.