Earth to Deep_6: The "it" just flew two jet airplanes into the World Trade Center, which, thanks to the "it," no longer exists. Neither do about 5000 former tenants.
Consider the following scenario: Massive, possibly nuclear, counter-retaliation by the United States on Afghanistan, Iraq, Syria, et al. Massive, possibly unconventional, counter-counter-retaliation by many non-citizen Arabs in the United States (think visa and green card-carrying engineers, post docs, grad students, undergrads, wives, domestic workers, etc.). Like I said, I spent some time with non-citizen Arabs this summer, and they aren't real fond of us.