Who de-activated ground-air missiles on 9-11?

George Z. Bush wrote:
"Mike Williamson" wrote in message

There is no issue to address. Your entire scenario is specious.
There is no "code to be punched in" when approaching a given airspace,


I know I'm way out of date, but no IFF any more (or its equivalent)? Just free
wheeling all over our airspace?


Civilian aircraft don't use IFF. Almost all aircraft use
transponders, however, which are typically set before takeoff
and changed infrequently in flight at the direction of ATC-
and their codes aren't used to authenticate identity in
the manner alleged by the moron who started this thread.

Military IFF systems also work differently than alleged
at the start of the thread. The encrypted Mode 4 is set
prior to takeoff (although on some aircraft you can reset
them in flight only because the actual equipment is inside
the pressure compartment) and changed on a time schedule
(typically Zulu day change).

Mike