As best I can tell there was no advance warning of the attack on the World Trade Center in 1993, which was the first significant foreign terrorist activity in the U.S. No tip-offs that it was coming.
Zealots often carry the day.
Iraq is not about oil.
And Oliver North was really a good soldier, up to the last moment, shoving memos into the shredder and defending the policy to the end.
You want to keep intelligence separate from policy.