(Sharon Chischilly | The New York Times) Norman Lopez, 78, plays a flute outside of his home in Towaoc, Colo., June 15, 2021. He said a boarding school teacher in Colorado smashed his hand-carved flute and threw it in the trash. Thousands of Native American children attended U.S. boarding schools designed for "civilizing the savage." Many died. Many who lived are reclaiming their identity.