(Sharon Chischilly | The New York Times) A truck crossing the Navajo Nation Tuesday was carrying uranium ore mined in Arizona, at the Pinyon Plain Mine, to the White Mesa Mill just south of Blanding, Utah, the last conventional uranium mill in the country. In this file photo, Carletta Tilousi, left, and Stuart Chavez walk near the mine, located less than 10 miles from the southern rim of the Grand Canyon near Flagstaff, Arizona, April 18, 2022.