Rumsfeld's top regret: not quitting after Abu Ghraib

Former US defense secretary Donald Rumsfeld admitted in an interview that the country "would've been better off" if he had quit after the 2004 Abu Ghraib scandal and spared no criticism of his colleagues in his new memoir published Tuesday.

In "Known and Unknown," Rumsfeld defends his handling of the war and recounts his government career serving Republican presidents from Richard Nixon to George W. Bush.

However the former Pentagon chief also admitted his biggest error during his tenure under Bush was his failure to convince the president to accept his resignation in the wake of the Abu Ghraib prison scandal....