"Q: Mr. Secretary, on Iraq, how much money do you think the Department of Defense would need to pay for a war with Iraq?

Rumsfeld: Well, the Office of Management and Budget, has come up come up with a number that's something under $50 billion for the cost. How much of that would be the U.S. burden, and how much would be other countries, is an open question. I think the way to put it into perspective is that the estimates as to what September 11th cost the United States of America ranges high up into the hundreds of billions of dollars. Now, another event in the United States that was like September 11th, and which cost thousands of lives, but one that involved a -- for example, a biological weapon, would be -- have a cost in human life, as well as in billions, hundreds of billions of dollars, that would be vastly greater," - January 19, 2003.

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