Shortly before George W Bush and Tony Blair launched their war, the Arab League issued a statement declaring that invading Iraq would “open the gates of hell”. Of all the pieces of intelligence that the CIA and British agents were gathering at the time, this turned out to be the only accurate one.
The invasion was launched on “evidence” about weapons of mass destruction (WMDs) that consisted mostly of whatever it was Iraqi informants knew our intelligence agencies most wanted to hear and would happily pay for. The biggest contributor to this self-fulfilling dossier was an alcohol-fixated defector called Curveball, who later admitted his improvisations about chemical weapons weren’t true.