The terrorist attacks of 9/11 seared themselves into America's collective memory.
Non-stop images of collapsing towers, airlines flying into buildings, and a low-flying jet plunging into the Pentagon cannot be forgotten.
Recordings of phone conversations between doomed passengers on United Fight 93--who knew about the previous attacks--and their loved ones on the ground, play over and over in our ears.
In the subsequent days and months, much was said about New York and Washington D.
and Pennsy.