traditional healers

There are only six people left in the world who know the healing songs of the Wachiperi, an ancient group in the Andes. One of them flew 3,000 miles to share his skills — and cure headaches.

Media reports this week said the Tanzanian government was going to go after "witch doctors" who attack albinos. But what, exactly, is a "witch doctor"? And why are they targeting people with albinism?