Tensions Rise as American Indian Tribes Move to Block a Pipeline

Horseback riders, their faces streaked in yellow and black paint, led the procession out of their tepee-dotted camp. Two hundred people followed, making their daily walk a mile up a rural highway to a patch of prairie grass and excavated dirt that has become a new kind of battlefield, between a pipeline and American Indians who say it will threaten water supplies and sacred lands.  Read more.