1. Wide side shot of Scott McClellan speaking in briefing room
2. Cutaway reporters
3. SOUNDBITE: (English) Scott McClellan, White House spokesman
"Let's look at what we knew: we knew, just like the United Nations Security Council and intelligence agencies across the world, and previous administrations, that Saddam Hussein had possessed and used weapons of mass destruction, that he had used chemical weapons, that he had a history of doing that. We knew that Saddam Hussein had large, unaccounted for stockpiles of biological and chemical weapons."
4. Exterior of the US Capitol
5. Senate floor
6. SOUNDBITE: (English) US Senator Ted Kennedy, Democrat-Massachusetts
"We may never know for sure who or what persuaded President Bush to go to war in Iraq. We know now that we should not have accepted at face value the claims that Iraq was linked to al-Qaida, or that Iraq was building nuclear weapons, or that Iraq had stockpiles of chemical or biological weapons. Our intelligence agencies clearly had inadequate information to justify such claims by the administration, but it is far from clear why President Bush was persuaded to accept that information as adequate."
7. Woolsey speaking
8. Cutaway of audience
9. SOUNDBITE: (English) James Woolsey, Former CIA Director
"We also know that Saddam admitted to producing 8-thousand-500 litres of anthrax. It sounds like a lot, but it's less than half a tractor trailer load if it's in liquid form and it's about four suitcases full if it's in powder form. So what they're still looking for may be pretty easy to hide and may be fairly small. We'll see. It doesn't make it any less a weapon of mass destruction."
10. Wide shot of Senators walking into Senate press gallery
11. Cutaway of reporters
12. SOUNDBITE: (English) US Senator Richard Lugar, Republican-Indiana
"I would simply say that the arguments being made that somehow we were misled by intelligence denies the fact that most Senators had available to them all of the information that is now being debated. They could have come to different conclusions about it."
The Bush administration is continuing to dispute assertions by leaders of the House Intelligence Committee that the United States went to war in Iraq on the basis of outdated and vague intelligence.
White House officials say that premise would have assumed a dramatic change in behaviour by Saddam Hussein - the elimination of Iraq's weapons of mass destruction since the departure of UN inspectors in 1998.
From Bush down, US officials made the case that war was necessary to remove the Iraqi president because of Iraq's stockpiles of illegal arms, including chemical weapons which could have been used against approaching American soldiers.
But in a letter last week to CIA Director George Tenet, the bipartisan leaders of the House Intelligence panel said those claims resulted largely from fragmentary and circumstantial evidence filled with uncertainties.
Democrats, meanwhile, echoed those concerns and questioned why President Bush pushed for a war based on what they say was "inadequate intelligence".
The CIA has denied the allegations and claims there haven't been enough hearings or opportunities for dialogue with committee members for the Intelligence Committee to come to such conclusions.
One former CIA chief agreed and added that while weapons inspectors have so far turned up nothing in their search for banned weapons of mass destruction, what they're looking for could actually be quite small and easy to hide.
The chairman of the Senate Foreign Relations Committee said US intelligence gathering could be improved.
But he said that all Senators who voted for the resolution authorising force in Iraq had adequate information to make an informed decision.