This Jan. 4, 2017, image provided by the U.S. Energy Department and its contractor Nuclear Waste Partnership shows workers moving waste underground at the Waste Isolation Pilot Plant near Carlsbad, N.M. The repository, the federal government's only underground spot for disposing of low-level nuclear waste, had been shuttered for nearly three years since a 2014 radiation release. (Sam Christensen/Nuclear Waste Partnership via U.S. Energy Department)
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