Once, albinos used to seek shelter from the sun. Now they have gone into hiding simply to survive, after a series of killings linked to witchcraft. In Tanzania, 25 albinos have been killed in the past year. The latest victim was a seven-month-old baby. He was mutilated on the orders of a witchdoctor peddling the belief that potions made from an albino's legs, hair, hands, and blood can make a person rich. Sorcery and the occult maintain a strong foothold in this part of the world, especially in the remote rural areas around the fishing and mining regions of Mwanza,...