In this April 9, 2015, file photo, people walk into the south portal of Yucca Mountain during a congressional tour of the proposed radioactive waste dump near Mercury, Nev., 90 miles northwest of Las Vegas. Nevada is branding federal shipments of weapons-grade plutonium to the state a year ago as a "secret ... smuggling operation," and urging a U.S. District Court judge in Reno to reject a bid to dismiss a lawsuit because the Energy Department has already promised no more material will be brought to the state. A court filing Monday, Dec. 16, 2019, seeks oral arguments in a yearlong legal battle over the state's bid for a court order to remove the highly radioactive material from a vast secure government reservation north of Las Vegas. (AP Photo/John Locher, File)
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