Robert Henry wrote:

The Star Trek approach to prevent commandeering of aircraft is a far more
honest approach than air marshals. "This aircraft will self-destruct in 2
minutes."

Presumably, this is on the mind of the pilot flying the fighter that would
be intercepting an airliner yelling 7600.

http://www.smh.com.au/articles/2004/...908941801.html
http://msnbc.msn.com/Default.aspx?id=3868332&p1=0
http://washingtontimes.com/metro/200...4905-2340r.htm

- Andrew