CAMERON, Ariz.—The Navajo Nation doesn’t allow radioactive uranium ore to be transported through its lands without permission, but that’s exactly what a mining company began doing this week on roads administered by the state—which has no such restrictions. …CAMERON, Ariz.—The Navajo Nation doesn’t allow radioactive uranium ore to be transported through its lands without permission, but that’s exactly what a mining company began doing this week on roads administered by the state—which has no such restrictions. …