Dick Cheney has been called the most powerful vice-president in US history, as well as the chief architect of America's so-called ‘war on terror', and a war criminal. We hear from a former colleague, and from an Iraqi poet.

Also in the programme: evidence that the earliest humans passed technology tips down the generations for more than 300,000 years; and as Paris offers the chance to buy prime spots in its most historic cemeteries, we ask what makes them so beguiling?

(IMAGE: U.S. Vice President Dick Cheney (L) listens as President George W. Bush makes remarks about the U.S. defense budget after meeting with military leaders at the Pentagon in Washington, November 29, 2007 / CREDIT: REUTERS/Larry Downing)