Tribal Nations, Americas
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Visitors walk through the entrance to the National Historic Landmark of Wounded Knee on the Pine Ridge Indian Reservation, located within the U.S. state of South Dakota. Summertime brings many people to Wounded Knee, where, in 1890, U.S. troops surrounded then massacred between 150 and 300 Lakota people. Violence erupted there again nearly a century later in 1973, when armed members of the American Indian Movement (AIM) occupied a trading post to demand tribal sovereignty, an overhaul of tribal leadership and other changes.