People walk into the north portal of Yucca Mountain during a congressional tour on July 14, 2018. The site was supposed to provide permanent storage for the nation’s nuclear waste, but safety concerns and opposition have stalled that plan.

People walk into the north portal of Yucca Mountain during a congressional tour on July 14, 2018. The site was supposed to provide permanent storage for the nation's nuclear waste, but safety concerns and opposition have stalled that plan.

People walk into the north portal of Yucca Mountain during a congressional tour on July 14, 2018. The site was supposed to provide permanent storage for the nation’s nuclear waste, but safety concerns and opposition have stalled that plan.

People walk into the north portal of Yucca Mountain during a congressional tour on July 14, 2018. The site was supposed to provide permanent storage for the nation’s nuclear waste, but safety concerns and opposition have stalled that plan.