 Sengier himself moved to New York , from where he directed the UMHK 's operations for the rest of the war . The U.S. government sent soldiers from the Army Corps of Engineers to Shinkolobwe in 1942 to restore the mine and improve its transport links by renovating the local aerodromes and port facilities . In 1944 , the Americans acquired a further 1 @,@ 720 long tons ( 1 @,@ 750 t ) of Uranium ore from the newly reopened mine . 
