The Navajo Nation has temporarily banned any transport of uranium and other radioactive material over its land without an explicit approval. The executive order issued by Navajo Nation President Buu Nygren will be in effect for at least the next six months. Earlier this week, Navajo police attempted to stop two trucks carrying uranium ore across the reservation from an Arizona mine to a Utah processing mill. Nygren said Energy Fuels Inc., which owns the mine and processing mill, did not provide any notice that the trucks would be crossing through Navajo Nation. Nygren said in a statement, “We’re taking this stance of interpreting and executing the law to ensure the safety of our people and respect for Navajo sovereignty.”