An alliance of tribal leaders from the United States and Chiefs of First Nations from Canada came together in Rapid City to oppose the Keystone XL pipeline and tar sands expansion.
On the Fourth of July, tribal leaders signed agreements to also oppose the Dakota Access pipeline and to stop the Interior Department from removing Yellowstone grizzly bears from the endangered species list.
Kevin Hart, a representative from Manitoba, says that 150 years of treaty violations have led to environmental destruction.