1. Atomic Bomb

2. Beginnings 1939 – Nazi rumors of atomic bomb Manhattan Project
Los Alamos, NM
Secret Operation for the A-bomb
Led by J. Robert Oppenheimer

3. VE Day FDR dies VP Harry S Truman is president
April 12, 1945
VP Harry S Truman is president
2 Weeks later he learned of Atomic bomb
May 8, Victory in Europe (VE Day)

5. War continues
July 16, 1945
First successful atomic bomb detonation
July 26 - Truman ordered surrender of Japanese
They refused

7. Options Attack mainland Japan Hold A-Bomb demonstration Drop A-Bomb
Estimated 500,000 American casualties
Hold A-Bomb demonstration
Already refused to surrender
Drop A-Bomb
Military wanted an “untouched” city
Show the destructive ability
Already 75,000 US casualties
Iwo Jima and Okinawa – est. 130,000 dead
Fire Bombing – 83,000 dead 125,000 wounded 1.2 million homeless

8. Hiroshima August 6 - Enola Gay dropped “Little Boy”
Untouched by bombs
100,000 people dead instantly
Out of 350,000
140,000 injured
- 70% city is destroyed
Japan does not surrender

9. Before and After

10. Nagasaki August 9 - Dropped “Fat Man”
42,000 dead instantly
40,000 injured
40% city is destroyed
September 2, 1945 formal surrender
VJ Day
Over 200,000 more died from radiation over the years