A Kayapo boy with traditional body paint cools himself down on the third day of the "Expedicionarios da Saude" (Brazilian Health Expeditions) in the Kikretum community in Sao Felix, northern Brazil, April 25, 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]