A Kayapo boy with traditional body paint and piercing is seen at his home the day before the start of the "Expedicionarios da Saude" (Brazilian Health Expeditions), in the Kikretum community in Sao Felix, northern Brazil, April 21, 2011. Twice a year, volunteer doctors build a mobile hospital to provide clinical and surgical treatments for indigenous tribes and residents from different parts of the Amazon rainforest. [Photo/Agencies]