U.S. Sen. Catherine Cortez Masto, D-Nev., and William Boyle, director of Office of Spent Fuel & Waste Science and Technology in the U.S. Department of Energyճ Office of Nuclear Energy, center, are interviewed by CBS News National Correspondent Jonathan Vigliotti during tour of Yucca Mountain 90 miles northwest of Las Vegas Friday, May 31, 2019. (K.M. Cannon/Las Vegas Review-Journal) @KMCannonPhoto