1. The Bombing of
Hiroshima and Nagasaki

3. POTSDAM DECLARATION



Called for Japan’s
unconditional
surrender and an
end to Militarism in
Japan.
Issued on July 26,
1945 by Harry S.
Truman.
If Japan did not
surrender it would
face "prompt and
utter destruction."

4. REASONS FOR A-BOMBING?






Japan refused the Declaration
The USA did not want to invade Japan
They reasoned that using the A-bomb
would deliver a huge blow to Japan
This would save the lives of hundreds
of thousands of American troops
US wanted to end the World War II
with less American casualties.
US wanted to test their two new bombs

5. MANHATTAN PROJECT


A secret US project
to create first
atomic weapon.
The bombs were
made of uranium
and plutonium
isotopes.

6. CHOOSING TARGETS
There were four
targets to choose
from: Hiroshima,
Kokura, Nagasaki,
and Niigata.
 Hiroshima and
Nagasaki were
selected because
they were left
mostly untouched
by war.


8. BOMBING ON HIROSHIMA

Hiroshima was the
primary target on
August 6, 1945.
B-29 ENOLA GAY,
followed by two
other B-29s. Great
Artiste and
Necessary Evil.

9. 


On August 6, 1945, Paul W. Tibbets and his
crew dropped the Uranium-based Atomic
bomb on Hiroshima.
The Gun-like bomb was code named “Little
Boy.”
60 kg of Uranium-235 = 13 Kilotons of TNT

10. Aftermath


The last killed
approx. 70,000
people in Hiroshima.
By the end of 1945
90,000-166,000
people died of
related diseases

11. 
1950-2000, 46% of
leukemia deaths and
11% of solid cancer
deaths among bomb
survivors were due to
radiation from the
bombs.

12. BEFORE
AFTER

13. JAPAN STILL DID NOT
REACT TO POTSDAM
DECLARATION

14. “The world will note that the first atomic
bomb was dropped on Hiroshima, a military
base. We won the race of discovery against
the Germans. We have used it in order to
shorten the agony of war, in order to save
the lives of thousands and thousands of
young Americans. We shall continue to use
it until we completely destroy Japan's
power to make war.”
- President Harry S. Truman

15. BOMBING


On the morning of
August 9, 1945, the
U.S. B-29
Superfortress
Bockscar, flown by
the Major Charles
W. Sweeney and his
crew.
Bomb Code name:
“FAT MAN”

16. 6.4kg plutonium-239=21 Kilotons of TNT

17. Aftermath

The death toll (of
all related deaths)
was about 135,000

18. 

Japan surrendered
to the Allied
Powers on August
14, 1945.
Emperor Hirohito
accepted the
Potsdam
Declaration

19. The End