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> WW2 (1939-1945) > USA, World
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USA > Manhattan Project 1942-1946
The Manhattan Project
had a cumulative work force of some
600,000,
which included women and people of color.
Photograph: National Archives
A Secret City With a Secret African American History
The U.S. government built Oak Ridge in 1942
to develop the world’s first atomic weapon.
NYT
June 11, 2022
https://www.nytimes.com/2022/06/11/
us/oak-ridge-tennessee-manhattan-project.html
Oak Ridge historians have been fighting
for the stories of African Americans
who supported the Manhattan Project in Oak Ridge, Tenn.,
to be more widely shared.
Photograph: National Archives
A Secret City With a Secret African American History
The U.S. government built Oak Ridge in 1942
to develop the world’s first atomic weapon.
NYT
June 11, 2022
https://www.nytimes.com/2022/06/11/
us/oak-ridge-tennessee-manhattan-project.html
Manhattan Project 1942-1946
highly confidential
government program
charged with building
the world's first atomic bomb.
https://www.npr.org/local/309/2019/06/17/
732849972/did-city-officials-know-about-the-manhattan-project-s-work-in-chicago
In 1933,
as Adolf Hitler was ascending
to power in Germany,
Hungarian physicist Leó Szilárd
proposed the notion
of a nuclear chain
reaction,
whereby neutrons released
from radioactive atomic nuclei
would hit other heavy nuclei
causing them to split (fission)
into smaller nuclei.
Every time
this splitting happened,
a little bit of energy
was released.
Do it
for a huge number of atoms
and you get a chain reaction,
with a related huge amount
of released energy.
In 1939,
together with Enrico Fermi,
Szilárd showed
that a multiplication
of released neutrons
was possible.
Szilárd knew
that the possibility
of a chain reaction
represented a shift
in world history.
An explosive device
with an uncontrolled
chain reaction would have
devastating consequences.
Szilárd convinced
Albert Einstein,
at the time the world's
most famous scientist,
to write a letter
to Franklin Roosevelt
urging the U.S. to embark
on a serious
bomb-making effort,
lest the Nazis did it first.
The result, in late 1941,
was the Manhattan Project,
a massive effort
led in Los Alamos
by J. Robert Oppenheimer
and overseen
by Major General Leslie Groves.
On July 16, 1945,
the first bomb was detonated
in the desert of Alamogordo
in New Mexico.
The mushroom cloud
raised 40,000 feet
and broke windows
100 miles away.
Upon seeing the effects
of their invention,
Oppenheimer pronounced
the now famous words
from the Bhagavad Gita
"Now I am become Death,
the destroyer of worlds."
On August 6 and 9,
the U.S. dropped
nuclear bombs
in Hiroshima and Nagasaki,
so far the only use
of atomic weapons
on a civilian population.
In a few months,
between 90,000
and 146,000 people
died in Hiroshima
and between 39,000
and 80,000 in Nagasaki,
with an estimated half
during the first day
after the bombing.
https://www.npr.org/sections/13.7/2016/07/13/
485819334/the-madness-of-humanity-nuclear-weapons-and-m-a-d
When a reported
7,000 African Americans
from the Deep South
were recruited to work
on the Manhattan Project
starting in 1942,
they knew little except
that the positions
were well-paid.
Drawn by newspaper ads,
word of mouth and recruiters
subcontracted by the military,
the workers arrived
by train or bus
in a heavily patrolled town
outside Knoxville, Tenn.
Signage around the plants
commanded:
“See nothing. Hear nothing.
Say nothing.”
What exactly
their blue-collar work
was supporting,
and the profound ways
it would alter
the course of history,
would remain a secret until
after the United States
unleashed atomic bombs
on Japan
at the end of World War II,
killing approximately
100,000 to 200,000 people.
https://www.nytimes.com/2022/06/11/
us/oak-ridge-tennessee-manhattan-project.html
https://www.nytimes.com/2024/01/17/
us/politics/atomic-bomb-secret-funding-congress.html
https://www.nytimes.com/2023/07/10/
books/oppenheimer-american-prometheus-sherwin-bird.html
https://www.nytimes.com/2022/06/11/
us/oak-ridge-tennessee-manhattan-project.html
https://www.npr.org/local/309/2019/06/17/
732849972/did-city-officials-know-about-the-manhattan-project-s-work-in-chicago
https://www.theguardian.com/cities/2018/may/03/
off-the-map-the-secret-cities-behind-the-atom-bomb-manhattan-project
https://www.npr.org/2017/11/28/
566980515/75-years-ago-scientists-conducted-an-unprecedented-nuclear-experiment
https://www.npr.org/sections/13.7/2016/07/13/
485819334/the-madness-of-humanity-nuclear-weapons-and-m-a-d
https://www.theguardian.com/us-news/gallery/2015/nov/11/
manhattan-project-life-inside-america-secret-nuclear-past-in-pictures
https://www.theguardian.com/world/ng-interactive/2015/aug/05/
hiroshima-nuclear-guide-anniversary-atomic-bomb
https://www.npr.org/2015/07/17/
423740547/seven-decades-ago-a-new-enormous-kind-of-explosion
https://www.npr.org/2014/12/16/
371253668/national-park-would-memoralize-manhattan-project
https://www.theguardian.com/world/picture/2013/aug/13/
manhattan-project-photography#img-42
http://www.nytimes.com/2013/01/27/
science/donald-hornig-a-bomb-scientist-and-brown-president-dies-at-92.html
https://www.npr.org/2012/12/04/
166402093/manhattan-project-sites-part-of-proposed-park
https://www.nytimes.com/2007/10/29/
science/3manharchive.html
https://www.npr.org/2005/07/15/
4756266/photographing-the-dawn-of-the-nuclear-age
https://www.npr.org/2003/02/27/1176693/revisiting-the-birth-of-the-bomb
https://www.nytimes.com/1961/07/16/
archives/columbia-shows-manhattan-project-documents-papers-once-classified.html
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/sept9_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/oct4_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/oct3_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/oct1_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/oct1_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/sept29_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/sept28_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/sept27_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/sept26_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/sept12_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/aug7_1945.pdf
http://graphics8.nytimes.com/packages/pdf/
science/20071030_MANHATTAN_GRAPHIC/apr27_1940.pdf
Julius Robert Oppenheimer
USA 1904-1967
American theoretical physicist
He was the director
of the Los Alamos Laboratory
during World War II,
and is often credited
as the "father of the atomic
bomb"
for his role in the Manhattan
Project,
the research and development
undertaking
that created the first nuclear
weapons.
Source: Wikipedia, 13 July 2023
https://en.wikipedia.org/wiki/
J._Robert_Oppenheimer
https://en.wikipedia.org/wiki/
J._Robert_Oppenheimer
https://www.nytimes.com/2023/07/10/
books/oppenheimer-american-prometheus-sherwin-bird.html
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