Interviews of Rudolf Peierls in Oxford, England and Eugene Wigner in Princeton, NJ done in 1984 as part of Patricia Rife's dissertation research. Peierls discusses the discovery of fission; his early years in Munich; his encounters with, among others, Werner Heisenberg, Wolfgang Pauli, Niels Bohr and Enrico Fermi; his education, travels, and research. Wigner discusses fission and his work on the first nuclear weapons project at Los Alamos Laboratory; also his memories of Albert Einstein.