Fritz Johann Hansgirg
Coming to the United States in 1940 , he worked with American industrialist Henry J . Kaiser to design a magnesium plant in California , but at the outbreak of World War II , Hansgirg was arrested by the FBI on a Presidential warrant and interned for "the duration of the war . " After the war , the Soviet Union captured Hansgirg's plants in northern Korea , using the plants' processes and equipment for their atomic bomb project against the United States , likewise , using them in the Manhattan Project , the exact details of which still remain classified in both the United States and Russia . 
<triplet> atomic bomb project <subj> Soviet Union <obj> country