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The Manhattan Project

The Manhattan Project. 1939 Albert Einstein writes FDR about “extremely powerful bombs of a new type” Scientists, researchers, & military personal work on the top secret project all across America, UK, Canada 1 st bomb tested in New Mexico where the blast could be seen 180 miles away!.

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The Manhattan Project

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  1. The Manhattan Project • 1939 Albert Einstein writes FDR about “extremely powerful bombs of a new type” • Scientists, researchers, & military personal work on the top secret project all across America, UK, Canada • 1st bomb tested in New Mexico where the blast could be seen 180 miles away!

  2. The Manhattan Project • Spent over $2 Billion! • Kept secret even from Vice President Truman • Researchers feared that their German counterparts were much closer to developing a bomb • US worked with British scientists but kept quiet about the project with their Russian Allies

  3. President Roosevelt’s Death • President Roosevelt didn’t live to see the end of the War in Europe or the Pacific • On April 12, 1945 Roosevelt had a stroke that took his life • Vice President Truman was sworn in as the 33rd President • President Truman was a World War I veteran

  4. TO SAVE LIVES AND END THE WAR QUICKLY PRESIDENT TRUMAN GAVE THE ORDER TO USE THE ATOMIC BOMB ON JAPAN APRIL 12TH 1945, VICE PRESIDENT HARRY TRUMAN TAKES THE OATH TO BECOME PRESIDENT OF THE UNITED STATES

  5. Considerations • Unconditional Surrender! • Save American lives • Advantage over Soviets in shaping the postwar world • Costs involved • Quick End to the War in the Pacific

  6. Voices of Opposition • Scientists petition President Truman • Some Allied Commanders felt Japan was ready to surrender • Invasion was planned and staging area prepared • Must give some warning to Japan

  7. MODEL OF “LITTLE BOY” ATOMIC BOMB ENOLA GAY, PLANE THAT DROPPED THE BOMB THE CREW OF THE ENOLA GAY, PLANE THAT DROPPED THE FIRST ATOMIC BOMB ON JAPAN

  8. THE FIRST ATOMIC BOMB WAS DROPPED ON THE CITY OF HIROSHIMA AUGUST 6TH, 1945, 70,000 KILLED AND EVEN MORE WOUNDED

  9. Hiroshima April 1945before bomb dropped

  10. Hiroshima August 11, 19455 days after bomb dropped

  11. A second atomic bomb was dropped on Nagasaki and the Japanese surrendered AUGUST 9TH, 1945 40,000 KILLED

  12. FOREIGN MINISTER SHIGEMITSU SIGNS JAPANESE SURRENDER DOCUMENT

  13. The Devastation • Near the blast sites were guaranteed death and destruction • Atomic Bombs were so destructive that they could not be considered a strategic weapon. • Destroyed military and civilian livelihood

  14. "The Most Terrible Weapon Ever Known in Human History" President Truman

  15. Casualties • Between Nagasaki and Hiroshima over 200,000 - 350,000 people died from injuries and radiation poisoning • Estimated that the atomic bomb saved lives for both Japan and US from a bloody invasion • Estimated number of deaths if United States attacked mainland Japan…over 1 million

  16. V-J Day September 2, 1945“Victory in Japan”“today the guns are silent”

  17. HIDEKI TOJO, FORMER JAPANESE PREMIER AND WAR MINISTER, TAKES THE STAND DURING THE JAPANESE WAR CRIMES TRIALS. HE WAS FOUND GUILTY OF WAR CRIMES AND HANGED.

  18. VJ DAY, AUGUST 14, 1945 WORLD WAR II ENDS

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