Sitting Bull's tribe declares independence

Descendants of the American Indian chiefs Sitting Bull and Crazy Horse yesterday declared their independence from the United States, announcing they were withdrawing from treaties signed with the federal government 150 years ago. [...] The tribal group said it was unilaterally pulling out from a series of treaties signed in the 19th century that it described as "worthless words on worthless paper" because they had been "repeatedly violated in order to steal our culture, our land and our ability to maintain our way of life"