Everybody’s talking about this Vanity Fair piece, citing it as one of the "best examples of online journalism" to date.

It’s a compelling story of how the U.S. Air Force responded to the events of 9/11, including excerpts from never-heard-before tapes acquired from NORAD (the North American Aerospace Defense Command).  These were the first guys who knew that something was amiss, up to an hour before the rest of the country knew.

An important contribution to the historical annals of 9/11 (the day itself) — at least the military response side of it — and well worth taking some time to muddle through.