Degelen Mountain, where more than 400 lbs of plutonium was recently entombed in former labs and bomb test tunnels, was part of the Soviet Union's Semipalatinsk Test Site, (shown in orange) in Kazakhstan. (Image: Finlay McWalter/Wikipedia Commons)
A remarkable 17-year effort by US & Russian scientists to secure an abandoned nuclear testing facility in Kazakhstan was finally completed last fall.
Host Marco Werman speaks about the largely secret operation with journalist Eben Harrell, co-author of the new report on the effort from the Belfer Center at Harvard University.
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