[cyncooper]

Right off I found this interesting from the Rice May 2002 press briefing:

Now, the FAA was also concerned of threats to U.S. citizens such as airline hijackings, and therefore, issued an information circular -- and an information circular goes out the private carriers from law enforcement -- saying that we have a concern. That was a June 22nd information circular.

[Sacajaweau]

I have yet to hear INS mentioned.