Andropov broke the first rule of intelligence: never ask for confirmation of something you already believe. Hitler had been certain that the D-Day invasion force would land at Calais, so that is what his spies (with help from Allied double agents) told him, ensuring the success of the Normandy landings. Tony Blair and George W. Bush were convinced that Saddam Hussein possessed weapons of mass destruction, and that is what their intelligence services duly concluded.