All through the progress and record of the atomic bomb, more than $2 billion was expended on the project. In addition to Oppenheimer, Peleris and Teller, other researchers also too part in the project. These consisted of David Bohm, Eugene Wigner, Leo Szilard and Neils Bohr.

Other who participated in the Manhattan Project were Otto Frisch, Felix Bloch, Emilio Segre, James Franck, Klaus Fuchs and Enrico Fermi. The main office was in Los Alamos.