Wiilliam Boyle of the Department of Energy’s Office of Nuclear Energy, center, speaks at the crest of Yucca Mountain during a congressional tour near Mercury on Saturday, July 14, 2018. Chase Stev …

Wiilliam Boyle of the Department of Energy’s Office of Nuclear Energy, center, speaks at the crest of Yucca Mountain during a congressional tour near Mercury on Saturday, July 14, 2018. Chase Stevens Las Vegas Review-Journal @csstevensphoto