SANTA CLARA PUEBLO, N.M. -- A mammoth wildfire raging in northern New Mexico is threatening sacred sites of American Indian tribes, after it forced thousands to evacuate from a town and a major nuclear weapons laboratory.More than 1,600 firefighters worked Saturday to stop the 177-square mile fire as it burned through a canyon on the Santa Clara Pueblo reservation and threatened other pueblos on the Pajarito Plateau.Read More... More on Wildfires