Werner Heisenberg's fourth experimental atomic pile, the L-IV, explodes spewing burning particles of uranium twenty feet in the air and catching the lab on fire. Heisenberg and Robert Doepel are nearly killed. The Manhattan Project is formed to secretly build the atomic bomb before the Germans. Robert Oppenheimer is named director. Reactor is graphite moderated.
Fermi oversees design and building.
Fission products expected. It is a smaller world than he believed. 1943 Clinton reactor goes into operation at Oak Ridge. 1943 Uranium toxicology studies at U. of Rochester. Potential doses greater than occupational limits.