THE ATOMIC BOMBINGSand
THE END OF WORLD WAR II
AUGUST – SEPTEMBER, 1945
The End of the War Japan Loses Ground: Why?
U.S. submarine campaign Massive U.S. bombing campaign Heavy battlefield casualties
Desperate measures: “Kamikaze” (Define) campaign “No surrender” on battlefield Homeland defense training
U.S. Closes in: How will the war End?
The Atomic Bomb When?
1942 -1945 Where?
Oak Ridge, Tennessee Los Alamos, New Mexico
Codename: The Manhattan Project Who?
Gen. Leslie Groves J. Robert Oppenheimer
The First Test: July 16, 1945 Trinity Site, Alamogordo, New Mexico Success
THE MANHATTAN PROJECT
TRINITY TEST SITE TOWER
TRINITY TEST, JULY 16, 1945
DETONATION SEQUENCE
10 SEC. AFTER DETONATION
DETONATION – FROM DISTANCE
To Bomb Or Not To Bomb Why drop the bomb?
Prevent an invasion of Japan Prevent the risk of massive casualties End the war more quickly
Why Not? Is it ethical? Do we really need to? Do we understand the long-term
effects? What do YOU think?
THE ATOMIC BOMBINGS When?
August 6, 1945: Hiroshima August 9, 1945: Nagasaki
Effect? Describe: Result? Sept. 2, 1945 – Japan
Surrenders World War II Ends
TIBBETS & SWEENY
MajorCharles Sweeny,U.S. Army A.F.,Lead Pilot,Nagasaki Mission
NAGASAKI BOMBER B-29 SUPERFORTRESS
“BOCKS CAR”
AERIAL VIEW - NAGASAKI BEFORE BOMBING
AERIAL VIEW – NAGASAKI AFTER BOMBING
NAGASAKI
BOMBING
AUGUST 9th,
1945
“LITTLE MAN” ATOMIC BOMB
“FAT BOY” ATOMIC BOMB
TYPES OF ATOM BOMBS
Hiroshima “Gun” Bomb
Nagasaki “Implosion” Bomb
ATOMIC BOMB FIGURES WW II ATOMIC BOMBS:
1000 TONS OF TNT = 1 “KILOTON” WW II BOMBS = 13,000 TONS = 13
KILOTONS 1952 “HYDROGEN” BOMB:
1 MIL. TONS OF TNT = 1 “MEGATON” HYDROGEN BOMB = 3 MIL. TONS OF TNT =
3 MEGATONS 1955: U.S. HAD 30,000+ MEGATONS OF
NUCLEAR WEAPONRY ALL EXPLOSIVE ORDNANCE USED BY
ALL NATIONS IN WWII ADDED TOGETHER = 1.2 MEGATONS
HIROSHIMA – AFTER BOMBING
HIROSHIMA “SHADOW”
NAGASAKI AFTERMATH
NAGASAKI DEAD, 1945
JAPANESE URBAN TARGETS
NAGASAKI BLAST RADIUS
NAGASAKI BOMB CASUALTIES
DISTANCE FROM GROUND ZERO (KM): 0-1.0 km: 88% Killed, 6% Injured, Pop.:
30,900 1.0-2.5 km: 34% Killed, 29% Injured,
Pop.: 27,700 2.5-5.0 km: 11% Killed, 10% Injured,
Pop.: 115,200
TOTAL: 22% Killed, 12% Injured,Pop.: 173,800
ATOMIC BOMB CASUALTIES
BOMBING EFFECTS ON JAPAN
20-KILOTON BLAST ESTIMATE
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