I hadn't heard this one before – apologies if you had.

Donald Rumsfeld is giving President Bush his daily briefing. He concludes by saying: “Yesterday, three Brazilian soldiers were killed.” “OH NO!” President Bush exclaims. “That's terrible!” His staff sits stunned at this display of emotion, nervously watching as the President sits, head in hands. Finally, the President Bush looks up and asks, “How many is a brazillion?”

(With thanks to Jules, who sent it.)