I am not in a position to say what NORAD ought or wouldn't do, but I would say that in a sense this is more and less than what NORAD is.
It is less, because NORAD is concerned with other matters, such as air-breathing threats, what is happening offshore, and so on. These are very broad things that may not have much to do directly with terrorism.
NORAD is also less, in the sense that these issues of terrorism are about individuals. They are about individuals inside our societies and individuals travelling to our countries.
When this is combined with the cyber-dimension, which is essentially a high-technology aspect of this, maybe the governments are going to have to look at this more carefully to see if this should be handled someplace else. I don't know.