Aztec dancers after a prayer ceremony at Oceti Sakowin Camp.Cierra, from the Comanche Nation in Oklahoma, after a prayer ceremony and direct action to stop the pipeline.Inside a yurt at Oceti Sakowin camp.Tara Houska is a citizen of Couchiching First Nation, a tribal attorney, the national campaigns director of Honor the Earth, and cofounder of NotYourMascots.org.