Gnter Wirths, along with eleven other German scientists including German-Russian medical doctor H. J. Born, were sent by the Soviets at the close of World War I to work in the Riehl group at Plant No.
Near the close of World War II, as American, British, and Russian military forces were closing in on Berlin, Riehl and some of his staff moved to a village west of Berlin, to try to ensure occupation by British or American forces. From 1945 to 1950, Riehl was in charge of uranium production at Plant No. 
