In June 1944, the Manhattan Project employed some 129,000 workers, of whom 84,500 were construction workers, 40,500 were plant operators and 1,800 were military personnel.
I juni 1944 beskæftigede Manhattanprojektet ca. 129.000 personer hvoraf omkring 84.500 var bygningsarbejdere, 40.500 var ansat til at drive anlæggene mens 1800 var militært personel.