In South Dakota, members of the Cheyenne River Sioux Tribe on Monday turned around a truck believed to be carrying construction equipment for the Keystone XL oil pipeline. In a statement, Tribal Chair Harold Frazier said, “Any vehicles or personnel working on the Keystone XL pipeline are not welcome on this reservation. … This is Sioux Territory, we will not stand for more encroachments and defilement of our land.” The Keystone XL pipeline has long been opposed by environmentalists, farmers and Native Americans. If completed, the pipeline would carry oil from Canada’s tar sands region in Alberta to refineries as far away as the Gulf of Mexico.