The invitation was on creamy stationery with fancy calligraphy: The Permanent Representative of the Islamic Republic of Iran "requests the pleasure" of my company to dine with H.E. Dr. Mahmoud Ahmadinejad. The dinner is at the Intercontinental Hotel — with names carefully written out at all the place settings around a rectangular table. There are about 50 of us, academics and journalists mostly. There's Brian Williams across the room, and Christiane Amanpour a few seats down. And at a little after 8pm, on a day when he has already addressed the U.N., the evening after his confrontation at Columbia, a...