Barack Obama is striving to recast America's image in the world. He has offered engagement to enemies and repudiated the Bush administration's conduct of the war on terror. Former Vice President Dick Cheney has condemned the Obama approach as a threat to America's national security. Stephen Hadley was National Security Adviser to President George W Bush. Stephen Sackur talked to him in Washington and put it to him that the Bush years set America on the wrong strategic track.