Please clarify...are you saying that the government is choosing to not say that Iraq helped to avoid an international incident (coverup) or that the gov missed it completely and folks like the author you noted has evidence as such?
I am saying that the government is choosing to not say that Iraq helped. The reason or reasons for this remain open to conjecture.
It was easier to blame home-grown terrorists;
It was easier to link it to revenge for Waco;
it was easier than admitting a democratic administration could not protect the heartland of America from a dictator 10,000 miles away.