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In this undated photo provided by the Pierce County Sheriff's Dept., Benjamin Colton Barnes, is shown. Officials said Barnes is a person of interest in the fatal shooting of a park ranger at Mount Rainier National Park, Sunday, Jan. 1, 2012 in Washington State. (AP Photo/Pierce County Sheriff's Dept.)

Thousands attend service for Mt. Rainier ranger

Top federal officials, fellow park rangers and thousands of well-wishers have gathered in Washington state to celebrate the life of Margaret Anderson, a Mount Rainier National Park ranger who was fatally shot on New Year's Day.