Native Brazilians from the Xavante tribe compete in a relay race carrying tree trunks during the Indigenous Nations Games in Porto Nacional, in the Amazonian state of Tocantins, Nov 9, 2011. Some 1,300 members of different ethnic groups from around Brazil are competing in the event that lasts through Nov 12. [Photo/Agencies]

Native Brazilians from the Gaviao tribe compete in a relay race carrying tree trunks during the Indigenous Nations Games in Porto Nacional, in the Amazonian state of Tocantins, Nov 9, 2011. [Photo/Agencies]