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The Atomic Bombs are Dropped - Dawn of the Nuclear Age

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The First Use of an Atomic Bomb in Human History

At the Epicenter
The first atomic bomb used in war was dropped on Hiroshima on August 6, 1945. Shortly after 8 o'clock on the morning of Monday, August 6, the Enola Gay, a U.S. B-29 bomber that carried the bomb, flew over Hiroshima. Masanobu Furuta, an announcer of NHK-Hiroshima, was on duty that day. He rushed to a radio studio as soon as the air raid alarm was sounded by the Chugoku Military Headquarters. [Information from Chugoku Military Headquarters: 3 large enemy planes flying west over Saijo City (Ehime Prefecture). Status of high alert for all.] As Furuya read the phrase "over Saijo City," he heard a loud creaking and felt the ferroconcrete building tilt heavily.

Hiroshima Destroyed And Alone
    The "special bomb" devastated the whole city of Hiroshima in an instant. Almost all municipal, prefectural and military links with the outside were cut. (Japan's 2nd General Headquarters was based in Hiroshima.) The radio studios of NHK-Hiroshima (about a kilometer from ground zero) were ruined, and the building of the Chugoku Shimbun newspaper company was utterly destroyed. Hardly any way was left to communicate news of the destruction wrought by the first wartime use of an atomic weapon to the outside. The only surviving link was a line that NHK-Hiroshima had installed at its transmitting station at Hara in the suburbs of the city. The devastation of Hiroshima was first reported to the outside world by way of this single line.

A Stillborn First A-bomb Report: "Hiroshima Completed Destroyed by a Special Bomb, 170,000 Killed"
    Hara Transmitting Station was also an emergency evacuation facility for the Hiroshima Branch Office of the Domei-Tsushin News Agency. Satoshi Nakamura, a Domei-Tsushin correspondent, was staying at a colleague's house in the suburbs. He sent the initial A-bomb report to NHK-Okayama at about 11:30 a.m., asking that station to convey the report to the Okayama Branch Office of the Domei-Tsushin. [At roughly 8:16 am. August 6, one or two large enemy planes flew over Hiroshima and dropped a special bomb that devastated the city. The death toll is thought to be about 170,000.] This report was sent to the Central Office of the Domei in Tokyo via the Okayama Branch, then passed on to the Imperial Headquarters, and finally stopped there.

 

Drawing by Hideo Kimura(Hiroshima)

Beneath the Mushroom Cloud
    Hiroshima was reeling under the most devastating attack ever experienced by mankind, a true inferno beneath the mushroom cloud.
    The atomic bomb destroyed Hiroshima instantaneously. How horrendous was the weapon? Reports on the number of casualties differ. Hiroshima's total population is said to have numbered about 420,000, including 250,000 civilian residents, 80,000 military personnel, and 90,000 non-residents or visitors.
    At 1:30 a.m. August 7 (Japan time), U.S. President Harry Truman announced that the new bomb dropped on Hiroshima was an atomic bomb.

Another A-bomb Dropped - Nagasaki
    The Soviet Union entered the war on August 8, and the following day, August 9, another atomic bomb was dropped, this time on Nagasaki. The initial target was Kokura, but poor visibility due to clouds caused the B-29 bomber carrying the A-bomb to make a hasty change of target. The second atomic bomb in history was dropped from an altitude of 9,600 meters above Nagasaki at 11:02 a.m.
NHK-Nagasaki was located 2,250 meters south-southeast of the epicenter of the A-bomb blast. Its transmitter was safe thanks to sandbag blast barriers but it could not broadcast because the army had commandeered the power generator. The Kyushu Haiden power company and an army team restored the service on August 13.


From surveys on the A-bomb victims in Hiroshima

Aug. 21, 1945
   Dead:

32,959
Aug. 26 (5 days later)
   Dead:

46,185
(Published by the Health and Medical Department of Hiroshima Prefecture)
Nov. 30, 1945
   Dead:
   Severelyinjured:
   Lightly injured:
   Missing:
   Affected:

78,150
9,428
27,997
13,983
176,987
(Published by Police Department of Hiroshima Prefecture. No military personnel included.)
Aug. 10, 1946
   Dead & Missing:
   Severely injured:

122,338
79,130
(Research by Hiroshima City)
Jun. 20, 1953
   Dead:

more than 200,000
(Livelihood Division of Hiroshima City)
Nov. 1976
   Dead:
(Aug. 6 to late Dec.)

approx. 140,000
(± 10,000)
(UN report)
The Nagasaki A-bomb

Aug. 9, 1945
2:49 Bockscar, a U.S. B-29 bomber, takes off from Tinian Island. Due to overcast skies over Kokura and bad weather, the plane veers away to Nagasaki.
11:02 The plane drops the second A-bomb in history (Fat Man, 45 tons) from a height of 9,600 meters above Nagasaki City.
(Focus of blast: 487 (±20) meters above No. 171 Matsuyama-machi).


Damage in Nagasaki

Dead:
Severely or lightly injured:
Affected persons: (Number of residents of partially or wholly destroyed houses within a radius of 4 km of the epicenter)
73,884
74,909
120,820
Affected households:(All households within a radius of 4 km, accounting for about 36% of households in the city.) 18,409
(Data published by Nagasaki City in 1950)

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