Spencer Weiner / Los Angeles Times
Kayakers on a Columbia River tour take in the view of the B reactor at the Hanford nuclear site just north of Richland in southeast Washington state. The "B" plant produced the world's first weapons-grade plutonium for the nuclear bomb dropped on Nagasaki, Japan, in World War II. In 2000, then-President Clinton proclaimed 195,000 acres along the river and around the nuclear site a national monument.
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