Some Sept. 11 Questions Go Unanswered While Sept. 11 commission co-chairman Thomas Kean considers the panel's report definitive, he concedes many details remain cloudy. Some groups say more investigation is needed to answer critical questions. NPR's Larry Abramson reports.
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Some Sept. 11 Questions Go Unanswered

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Some Sept. 11 Questions Go Unanswered

Some Sept. 11 Questions Go Unanswered

Some Sept. 11 Questions Go Unanswered

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  • <iframe src="https://www.npr.org/player/embed/3611721/3611722" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

While Sept. 11 commission co-chairman Thomas Kean considers the panel's report definitive, he concedes many details remain cloudy. Some groups say more investigation is needed to answer critical questions. NPR's Larry Abramson reports.