Had we overthrown Saddam then, we might not have been in this mess today. This was before Al Qaeda appeared on the scene.
(Go Israel, Go! Slap 'Em Down Hezbullies.)
Staying in Saudi Arabia is what got OBL's attention.
When the U.S. put military base in SA to protect the Kurds in the north and Shia in the south OBL declared war on America and our goverment did nothing.