A resident of Nairobi's Korogocho slum, learns the rudiments of martial arts in order to survive in one of Kenya's most dangerous shanty towns on January 30, 2010. This self-defense group started in 2007 as way of fighting back at the young bandits of Korogocho who started raping women three or four times their age. "Every time the boys make a robbery, they will ask the grandmas to sleep with them. Young men believe that young girls are all infected with Aids, so they'd rather go to the old ones, because they know that we don't have any more partners," explains Mary Wangui, 73, one of the oldest pupils, now a teacher. (TONY KARUMBA/AFP/Getty Images) #