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    'Power Wars' charts U.S. security shifts

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'Power Wars' charts U.S. security shifts

Richard Gil Kerlikowske, Commissioner for the U.S. Customs and Border Protection, tells CNN's Richard Quest what he learned from the book 'Power Wars'.

'Power Wars' charts U.S. security shifts

Richard Gil Kerlikowske, Commissioner for the U.S. Customs and Border Protection, tells CNN's Richard Quest what he learned from the book 'Power Wars'.