By 1984, the Wanapum Tribe numbered two full-blooded survivors. One was Frank Buck, 16 years old when the Army came to build the Hanford Engineer Works. He was the son of Chief Johnny Buck, who became a friend of many Hanford project people. Frank was uncle to Rex Buck. Frank worked at the Wanapum Dam information center, upstream from Hanford, talking to visitors about the history of his tribe.