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This photo shows students at a Presbyterian boarding school in Sitka, Alaska, in the summer of 1883. U.S. Catholic and Protestant denominations operated more than 150 boarding schools between the 19th and 20th centuries. Native American and Alaskan Native children were regularly severed from their tribal families, customs, language and religion and brought to the schools in a push to assimilate and Christianize them. (AP/Presbyterian Historical Society, Philadelphia)