For decades, Valeria Paye Pereira and her tribe of Tiriyo Indians in Brazil's Para state have fought wildcat miners...[who] have cut trees, polluted waters and attacked the tribe's wood-and-straw homes. Now, the 1,100-member tribe is taking its fight to the nation's capital to fend off legislation that would allow more mining on its lands... Lawmakers are debating whether to allow companies such as Cia. Vale do Rio Doce and Anglo American Plc to team up with Brazil's 400,000 Indians to tap unexplored land... While supporters say doing so will curb violence and environmental damage caused by illegal digs, indigenous groups say it threatens their way of life.