At one point, the Soviet Union used one each day in a region of eastern Kazakhstan called "the Polygon."  
At one point, the Soviet Union used one each day in a region of eastern Kazakhstan called "the Polygon."  Using x-rays to contain plasma, they operate using a three-stage process; the all-important second stage uses beryllium and lithium compounds under intense [*] pressure, created by a fission chain reaction. For 10  points—name these weapons of mass destruction, invented in the US by Edward Teller.
At one point, the Soviet Union used one each day in a region of eastern Kazakhstan called "the Polygon."  
fusion or thermonuclear weapons or devices [accept Hydrogen bomb]