We will see over the next few days/weeks but hijack procedures need to be change/established. After the 1st aircraft impacted the WTC.. they had 18 minutes before the second did, the controller aparently heard "we have more planes?" At the time I am sure it meant nothing, maybe the military need to have fighters on standby at major airports ready for immediate deployment. Maybe it's time that all airspace around busy airports be completely restricted to any traffic other that commercial, this way it might be easier to control. The radar controller sees an unidentified prime target on the radar..up go the fighters to find out what's going on. Sounds excessive, could have saved the day