FILE - In this May 9, 2017 file photo, signs are posted by the Hanford Nuclear Reservation in Benton County, in Richland, Wash. The U.S. Department of Energy said Wednesday, Oct. 4, 2017 that workers ...

Workers at the Hanford Nuclear Reservation have started injecting grout into a partially collapsed tunnel that contains radioactive wastes left over from the production of nuclear weapons. The grout ...

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