In an assessment backed by several of Clarke's colleagues in the Clinton administration, he is described by some in the Bush White House as a "my-way-or-the-highway type, " who can become irritable and difficult to work with if he does not believe his views are being heeded.

CNN: Rice forcefully rebuts Clarke testimony

Only recently has the first physical dummy for side-impact crashes--the most dangerous type of crash--been approved by the National Highway Traffic Safety Administration.

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