On April 17, 1945, U.S. Lieutenant Colonel Boris T. Pash commandeers over half a ton of uranium at Strassfurt, Germany, in an effort to prevent the Soviets from developing an A-bomb. Pash was head of the Alsos Group, organized to search for German scientists in the postwar environment in order to prevent the Soviets, previously Allies but now a potential threat, from capturing any scientists and putting them to work at their own atomic research plants. Uranium piles were also rich “catches,” as they were necessary to the development of atomic weapons.