Scott Ritter, formerly the top United Nations weapons inspector in Iraq, has long argued that claims that Saddam Hussein possessed biological, chemical and nuclear weapons programmes were massively exaggerated. His public campaign against the US-led invasion of Iraq made him a hated figure of the American right, which still demonises him as an apologist for the ousted Baghdad regime. Now, at the very moment when the absence of weapons of mass destruction in post-Saddam Iraq should make Mr Ritter feel vindicated, he faces new questions about his relationship with Baghdad after he quit his UN job in 1998. Mr Ritter...