Doesn't matter, its all a rediculous guessing game that you want to turn into giving credit to someone or some administration because there has been an absence of something.
Like I said, after 1993 there were ZERO attacks on American soil until 9/11/2001. Thats NINE years, more than three times the length of time as the current absence of attacks on American soil.
Just because theres an absence of something, doesn't mean its been nullified by someone or a group of people... it just hasn't been repeated, YET.
-SW