Example image of eyePlorer eyePlorer map for 'Manhattan Project': Nuclear weapon World War II Denmark United Kingdom United States General officer Leslie Groves United States Army Corps of Engineers J. Robert Oppenheimer Physics German nuclear energy project Nazi Germany 1000000000 (number) United States dollar Hanford Site Los Alamos National Laboratory Oak Ridge, Tennessee Uranium United States Atomic Energy Commission Atomic nucleus Nuclear fission Radiation Atomic mass Electron Neutron Proton Henri Becquerel Marie Curie Pierre Curie Radioactive decay Radium Alpha particle Ernest Rutherford Nitrogen Mass–energy equivalence Edgar Rice Burroughs H. G. Wells Novel The World Set Free Leó Szilárd Ernest Walton John Cockcroft Frédéric Joliot-Curie Irène Joliot-Curie Enrico Fermi Fritz Strassmann Germany Otto Hahn Barium Isotope