U.S. Sen. Catherine Cortez Masto, D-Nev., talks to Chris Spinder, a producer with CBS News left, during a tour on a high ridge line on Yucca Mountain 90 miles northwest of Las Vegas while getting a tour 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, right, Friday, May 31, 2019. (K.M. Cannon/Las Vegas Review-Journal) @KMCannonPhoto