"Robert Weldon" <rweldon.spamblock@jrpspamblock.ca> wrote in message
news:4Jzmg.77265$Mn5.42149@pd7tw3no...

Do you have any concept of how many planes were in the air at that time?

As

far as I know, Norad doesn't routinely track domestic originated flights.
Their job is to watch for incoming missiles and fighters, from outside the
U.S. boundaries, not track every single plane in the air at any given

time.

You are right, "Norad doesn't routinely track domestic originated flights",
but
ATC's have a 10 minute window in which to report, suspected hijacked craft,
craft off course or not responding by radio, to NORAD. They just happened to
be running
a hijack simulation at the same time which made identifying the real
hijacked planes difficult.

http://www.ericblumrich.com/buddy.html