http://www.cooperativeresearch.org/project.jsp?project=911_projectThis link is called the "Terror Timeline". It contains a collection of mainstream media articles which have been saved and cited meticulously.
I have been in there 30 minutes and barely scratched the surface. If you need to make an argument here, the support is here, and it is documented. if you are curious about 911 warning, you can click on that topic and see every single article the author found, and the source.
Anyone who tells we had no warning about 911 = LIAR. I don't care where you sit on political parties - you cannot deny that we were lied to, and repeatedly.
My favorite: "Denials"
http://www.cooperativeresearch.org/timeline.jsp?timeline=complete_911_timeline&the_post-9/11_world=denialsSeptember 11-12, 2001: Senior US Officials Claim No Specific Warnings or High Threat Recently
September 12, 2001: Powell Claims No Evidence Specific Intelligence of Attack Was Missed
September 12, 2001: US Denies Any Hints of bin Laden Plot to Attack in US
September 14, 2001: FBI Director Caught in Whopper
September 16, 2001: Bush Claim That Using Planes as Missiles Was Impossible to Predict Is Contradicted by Former CIA Official
September 16, 2001: Cheney Says There Was No Warning of ‘Domestic Operation or Involving What Happened’
September 25, 2001: FAA Head Says No One Imagined Airplanes Used As Lethal Weapons
October 17, 2001: Military Head Says He Hadn’t Thought of 9/11-Type Scenario
May 8, 2002: FBI Could Not Have Foreseen 9/11, Declares Director
May 16, 2002: Nobody Predicted 9/11-Style Attacks, Says Rice
May 17, 2002: Bush Claims He Did Not Know ‘Enemy Was Going to Use Airplanes to Kill’
June 4, 2002: Bush Acknowledges Agencies Made Mistakes, Continues to Insist That 9/11 Could Not Have Been Prevented
June 18, 2002: FBI Director Maintains 9/11 Attacks Could Not Have Been Prevented
April 13, 2004: Bush Continues to Insist That 9/11 Could Not Have Been Prevented
