DONALD RUMSFELD: Together with his old friend and one-time protégé Dick Cheney, Rumsfeld led the hawks who won the battle for Bush's heart. As Defence Secretary, he was advocating an attack on Iraq shortly after 9/11, warning of the WMD menace posed by Saddam. He saw the invasion as a test of his belief that small, hi-tech forces could win modern wars. They could – but were insufficient to keep the peace. Having wrested control of the occupation from the State Department, Rumsfeld bears responsibility for the pre- "surge" fiasco, including the shame of Abu Ghraib. Arrogant and bullying, more nationalist than neocon, he will go down as perhaps the most controversial Pentagon chief ever. Twice he was target of a "generals' revolt"; in summer 2001 and early 2006. He was forced out in November 2006, after the Democrats recaptured Congress.