For ten days in June, the Yankton Sioux Reservation on the windswept high plains of South Dakota was a gathering place for indigenous tribal leaders from around the globe and hundreds of Native and Euro-American listeners. The occasion was the Star Knowledge Conference and Sun Dance, convoked by Lakota (Sioux) spiritual leader Standing Elk in response to a vision. The vision showed that Native American spiritual knowledge about the Star Nations was to be shared. This Conference also fulfilled ancient Hopi and Lakota prophecies.