Opening with the blast of the experimental bombing in Los Alamos , New Mexico in July 1945 , the film turns to the '' Enola Gay '' and its mission over the Japanese city of Hiroshima . The narrator informs the audience about the military significance of the city and that it had not experienced bombing as yet , but it had been warned . The results of the bombing are then explained , with footage and descriptions of how various buildings were affected by the blast at different distances from ground zero . Afterwards , an interview with Father John A. Siemes , a Jesuit priest who was living at the Novitiate of the Society of Jesus in Nagatsuka , is shown to give the audience a firsthand account of the bombing . Near the end of the interview , the priest is seen reading from a prepared statement
the experimental bombing
Trinity (nuclear test)
The Atom Strikes!