1. THE ATOMIC BOMB HIROSHIMANAGASAKI "THE MOST TERRIBLE WEAPON EVER KNOWN IN HUMAN HISTORY “ -- Secretary of War Henry L. Stimson

3. Development Just before WWII the Germans had successfully split a uranium atom The secret Manhattan Project was set up after Albert Einstein warned that the Germans may be making their own bomb

5. Leading up to the Drop Roosevelt had died April 12, 1945, causing Harry Truman to take office Allies continue to win key battles during 1944 and 1945 The final push would be the invasion of the Japanese mainland

6. Key Decision An invasion of Japan could cost 1 million American lives First Atomic Bomb tested July 16, 1945 U.S. asks Japan to surrender, but get no response August 6, 1945 – U.S. drops Atomic bomb on Hiroshima

7. Why did President Truman make the decision to drop the A-Bombs on Japan?

8. Building the Bomb Called the Manhattan Project Started in 1942 Built in Los Alamos, New Mexico Test detonation on July 16, 1945 Devastation and danger of the bomb not realized One bomb was equal to 20,000 TONS of TNT. Manhattan Project scientists prepare to raise the bomb to the top of the test tower at Alamogordo, New Mexico, July 1945.

10. The bombing of Hiroshima Facts: Monday, August 6, 19458:15 A.M. Dropped by the Enola Gay The name of the bomb: "Little Boy" Initial death toll: Between 42,000 and 93,000 Possibly 130,000 died by November 1945 The wind generated by Little Boy caused the most serious damage to the city and people.

11. The bombing of Nagasaki Facts: Monday, August 9, 1945 11:02 A.M. Dropped by the Boxcar The name of the bomb: "Fat Man" Initial death toll: 73,884 Injured: 74,909Total Casualties: 148,793 Large numbers of people died in the following years from the effects of radiation poisoning.

12. Mushroom Cloud over Nagasaki

13. Devastation August 9, 1945 – U.S. drops second bomb on Nagasaki 73,000 killed in Hiroshima, 37,500 killed in Nagasaki Japan surrenders on Sept. 2, 1945 in fear of another Atomic bomb

14. Why Truman decided to drop “The Bomb” 1. Japanese soldiers (although losing) fought to the death and caused the U.S. to take bad losses 2. Advisors told Truman that invading Japan would cost the U.S. military over 1 million casualties 3. The Japanese government was warned before the bombs were dropped Truman’s diary Truman’s diary

15. If you were in President Truman’s shoes would you have dropped the bombs on Japan…why or why not?

17. DEVASTATION OF THE BOMBS HIROSHIMA

18. NAGASAKI

19. People caught in the open within 0.6 miles of the blast experienced temperatures so high that the dark, heat- absorbing pattern of their clothing was burned into their flesh.

31. Discuss the significance of dropping the A-Bombs...what was the outcome and how has it changed the world since?