Norad can track the smallest object that flyes, it is made to track thousands of nuclear missles coming in and separate the fake ones from the real ones.
In the year 2000 there were 60 civilian planes that went off their course,
all were intercepted by fighter planes in less than 20 minutes.
This is standard procedure in case of a plane which goes other way than it is supposed to
No orders need to be given to intercept it, no decisions, standard manual rules. Orders need to be given to shoot it down not to intercept.
On 9/11 4 planes fly undisturbed , not even one was intercepted ?
Videos :
http://video.google.com/videosearch?q=9%2F11
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One day there will be so many houses, that people will be bored and will go live in tents. "Why are you living in tents ? Are there not enough houses ?" "Yes there are, but we play this Economy game"