I agree with allowing an open debate about questions of the veracity of 9/11, after all we all want to know what the truth is. I simply believe that our government is incompentent in its primary duty of security.
Though I recall that after the Soviet Union collapsed our military was looking for a new 'purpose' and so we went into the nation building and were more than happy to find war. Robert Higgs wrote a book
Crisis and Leviathan which basically supports
the premise that the government likes to make crises out of things to grow bigger, so we have the 'war' on poverty, drugs, terrorism etc, until of course we fighting 'wars' on all fronts.
http://www.mises.org/store/Crisis-and-Leviathan-P138C0.aspx