The U.S. Department of Energy revealed on Wednesday that it secretly shipped weapons-grade plutonium from South Carolina to a nuclear security site in Nevada months ago despite the state’s protests. The justice department notified a federal judge in Reno that the government trucked in the radioactive material to store at the site 70 miles north of Las Vegas before Nevada asked a court to block the move in November. Department lawyers said in a nine-page filing that the previously classified information about the shipment from South Carolina can be disclosed now because enough time has passed to protect national security. They didn’t specify when the one-half metric ton of plutonium was transferred. Nevada Governor Steve Sisolak…

Justice department lawyers said Wednesday that no more shipments of weapons-grade plutonium are planned from South Carolina to Nevada.