In the interview stick to your guns, theres nothing wrong with disagreeing with them (especialy when it comes to motivation etc). One thing which really threw me (after my sixth such interview) was the way they constantly interupt you when you're in full flow. Don't worry if this happens, it just means they know you know the answer and are moving on a fast as poss (to find something you dont know!).
As someone else said the economist is a good source, though searching back for old news stories on Kashmir / WMD / Middle Eastern Politics can bring rewards too.
Dont forget to watch their eyes roll heavenwards if you mention that you've wanted to be a pilot since age <whatever>.
Oh and don't get to pissed the night before your interview, otherwise you might get called in at an obscene hour of the morning having to cope with a hangover too, not of course that I know how that feels
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