Monday morning,August 6, 1945,dawned bright and clear. As the summer sun climbed in the sky,the temperature rose rapidly. The air raid warning just after midnight（0:25）was cleared at 2:10 a.m. Having finally settled back to sleep,people were abruptly awakened by another alert siren at 7:09. That turned out to be an American military recon-naissance plane cruising at high altitude, so the all-clear was sounded at 7:31. Sighing relief, people returned from their air raid shelters and other places of refuge. They were eating late breakfasts or on their way to work,beginning the day. 　　Suddenly, a bell in the lnformation Relay Room at the Hiroshima Central Broadcasting Staation signaled the notice to broadcaast an air-raid alarm. Announcer Furuta ran to the Alarm Office, grabbed the text, rushed to the studio, and pushed the buzzer. "Chugoku Regional Military Headquarters report ! Three large enemy planes advancing from Saijo..."Sud-denly, he heard a terrible cracking sound, felt the ferro-concrete structure tilt to one side, and was thrown through the air.

Super-high-temperature Fires Heat Rays Blast