FILE - In this Nov., 20, 2013, file photo, radioactive waste, sealed in large stainless steel canisters, are stored under a five-feet of concrete in a storage building at the Savannah River Site near Aiken, S.C. South Carolina says it's filed its largest lawsuit ever against the federal government, seeking to force the U.S. Department of Energy to make good on a deal over removing plutonium from the state. The lawsuit, filed Monday, Aug. 7, 2017, seeks to recover $100 million from the agency over failing to comply with an agreement to remove one metric ton of weapons-grade materials from the Savannah River Site. (AP Photo/Stephen B. Morton, File)