Michael Chertoff was the man whose task it was to keep the USA safe. For four years he was the Director of Homeland Security under George W Bush and a leading figure in America's "war on terror".
Mr Chertoff talks to Tim Franks about the extraordinary rendition of terror suspects and US co-operation with regimes that may have used torture.
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You can watch this interview on Wednesday 14th September on BBC World News at 03:30 GMT, 08:30 GMT, 15:30 GMT and 20:30 GMT.
And on BBC News Channel at 04:30 BST on Wednesday 14th September 2011 and at 00:30 BST on Thursday 15th September 2011.