This undated photo provided by the U.S. Department of Energy show a continuous miner performing mining activities in the Waste Isolation Pilot Plant near Carlsbad, N.M. The U.S. Energy Department announced Tuesday, Oct. 17, 2017, that the work to carve out more disposal space from the ancient salt formation where the Waste Isolation Pilot Plant is located will begin later this fall. The work should be done in 2020. (David X. Tejada/U.S. Department of Energy via AP)
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