Ivan Lookinghorse (C) and other Fort Laramie treaty riders meet in the kitchen of the Rockyford School gymnasium on the Pine Ridge Reservation in Rockyford, South Dakota, U.S., April 20, 2018. "Understand that we, as a people, we have been in poverty, we have been in depression, we have been Christianised, we have been boarding schooled, our language has been taken away from us, but we are on our way back to who we once were," Lookinghorse said. "We are standing up on our two feet," he continued "We are taking our place in the world, the protectors of the Grandmother Earth." REUTERS/Stephanie

Ivan Lookinghorse (C) and other Fort Laramie treaty riders meet in the kitchen of the Rockyford School gymnasium on the Pine Ridge Reservation in Rockyford, South Dakota, U.S., April 20, 2018. "Understand that we, as a people, we have been in poverty, we have been in depression, we have been Christianised, we have been boarding schooled, our language has been taken away from us, but we are on our way back to who we once were," Lookinghorse said. "We are standing up on our two feet," he continued "We are taking our place in the world, the protectors of the Grandmother Earth." REUTERS/Stephanie

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Ivan Lookinghorse (C) and other Fort Laramie treaty riders meet in the kitchen of the Rockyford School gymnasium on the Pine Ridge Reservation in Rockyford, South Dakota, U.S., April 20, 2018. "Understand that we, as a people, we have been in poverty, we have been in depression, we have been Christianised, we have been boarding schooled, our language has been taken away from us, but we are on our way back to who we once were," Lookinghorse said. "We are standing up on our two feet," he continued "We are taking our place in the world, the protectors of the Grandmother Earth." REUTERS/Stephanie Keith SEARCH "KEITH ANNIVERSARY" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.