U.S. Sen. Catherine Cortez Masto, D-Nev., gets a tour of Yucca Mountain 90 miles northwest of Las Vegas Friday, May 31, 2019, from William Boyle, director of Office of Spent Fuel & Waste Science and Technology in the U.S. Department of Energy’s Office of Nuclear Energy. (K.M. Cannon/Las Vegas Review-Journal) @KMCannonPhoto