"Queen Elizabeth mingled with hundreds of lepers today and found them all cheerful" -- in 1956, that was the headline of QE's first trip to Nigeria, then still a British colony. This week she's visiting again, under only slightly less surreal conditions. Because of security concerns, she will not visit any actual Nigerians, but instead walk through a Potemkin village, a BBC television set with actors standing in for the hoi polloi. Um, OK.