Nicodemus was a physicist at the Los Alamos Scientific Laboratory from 1943 to 1946 . He went to Los Alamos from Stanford University with physicists Hans H. Staub and Felix Bloch . At Los Alamos , Nicodemus worked with several noteworthy physicists , including Felix Bloch , Bruno Rossi , Hans H. Staub , James H. Coon , and Jerome Fleeman . Nicodemus went to Los Alamos Scientific Laboratory to be part of the Manhattan Project team responsible for development of “ The Gadget , ” ( the atomic bomb ) . In 1945 , he witnessed the initial detonation of a nuclear device at Trinity
Trinity
Trinity (nuclear test)
David B. Nicodemus