...............where they proceeded to illegally cross Americas Southern border in secret in preparation for a terrorist act within the US.
................where they proceeded to a large Northern Mexican city where they could book a flight such that there would be NO 3 hour lead time to get a warning before the plane that they hijacked was plowed into Houston, San Diego or LA.
The ringleader of the AQ Mexico/South American operation Jafar the Pilot (Adnan G. El Shukrijumah) is still at large...
http://www.as-sa.org/terroralert.html