Turning 'radioactive waste' into glass: The risky plan to clean up 56 million gallons of toxic sludge.

The US buried 56 million gallons of highly radioactive waste in 177 underground tanks in 1990. Now, experts will use it to make 4.2 metric tons of glass daily. This massive cleanup project at the Hanford site aims to safely store the dangerous leftovers from decades of plutonium production work.