RENDITION SHOULD be shown to all intelligence officers as a vital part of their training, former ASIS officer Warren Reed told me when I asked him for a professional assessment of the film. I have to admit I was surprised. Certainly John Le Carré novels have been used as textbooks for Britain’s MI6 courses: but books like The Spy Who Came in from the Cold and Call from the Dead were based on real operations. Still, on a first viewing Rendition seemed to me worthy but a little contrived. There is a terrorist bombing in an unnamed North African city.…