A mushroom cloud billows about one hour after a nuclear bomb was detonated above Hiroshima, Japan on Aug. 6, 1945. Three days later, on Aug. 9, 1945, the United States bombed Nagasaki. The bombs, nicknamed Little Boy and Fat Man, killed a combined 129,000-246,000 people and ushered in the nuclear age. AP Photo

This picture made from the town of Yoshiura on the other side of the mountain north of Hiroshima, Japan, shows the smoke rising from the explosion of the atomic bomb at Hiroshima, Aug. 6, 1945. It was picked up from an Australian engineer at Kure, Japan. Note the radiation spots on the negative caused by the explosion of the A-bomb, almost ruining the film. (AP Photo)

A massive column of billowing smoke, thousands of feet high, mushrooms over Nagasaki, Japan, after the United States dropped an atomic bomb on Aug. 9, 1945, just three days after the U.S. dropped a bomb on the neighboring city of Hiroshima.U.S.Signal Corps/AP Photo

The long shadows of Hiroshima and Nagasaki

70th anniversary of atomic bombing

An Allied war correspondent stands amid the ruins of Hiroshima, Japan in 1945, just weeks after the city was leveled by an atomic bomb. (AP Photo)

Yosuke Yamahata's photographs of Nagasaki the day after the atomic bombing. An arch is the sole landmark following the attack.

On August 6th 1945, "Little Boy", the first atomic bomb to be deployed in warfare was dropped on the Japanese city of

Hiroshima by the United States Army Air Forces, killing tens of thousands of civilians.

Three days later, "Fat Man", the only other nuclear weapon ever to be used against an enemy in war devastated

Nagasaki, thousands more perished.

The second world war ended six days later.

Sacred trees stand bare and broken near fallen tombstones at the temple of Kokutaiji, following the US atomic bombing of Hiroshima, Japan on August 6, 1945. (Photo by Keystone/Getty Images)

The Hiroshima explosion, recorded at 8:15am, August 6, 1945, is seen on the remains of a wristwatch found in the ruins in this 1945 United Nations photo. The shadow of the small hand on the eight was burned in from the blast, making it appear to be the big hand. (AP Photo/United Nations)

Hiroshima

On August 6, 1945, 8.15 am, the uranium atom bomb exploded 580 metres above the city of Hiroshima with a

blinding flash, creating a giant fireball and sending surface temperatures to 4,000C.

Fierce heat rays and radiation burst out in every direction, unleashing a high pressure shockwave,

vaporising tens of thousands of people and animals, melting buildings and streetcars, reducing a 400-year-

old city to dust.

Beneath the center of the explosion, temperatures were hot enough to melt concrete and steel. Within seconds, 75,000 people had been killed or fatally injured with 65%

of the casualties nine years of age and younger.

An undated image shows Hiroshima after the atomic bombing. Photo: Hiroshima Peace Memorial Museum/European Pressphoto Agency

The gutted Hiroshima Prefectural Industrial Promotion Hall, which is currently called the Atomic Bomb Dome or A-Bomb Dome, is seen near Aioi Bridge in Hiroshima after the atomic bombing of Hiroshima on August 6, 1945, in this undated handout photo taken by Toshio Kawahara and released by his grandchild Yoshio Kawamoto. Reuters

Hiroshima, 1945. Bernard Hoffman The LIFE Picture Collection/Getty Images

Atomic bomb damage at Hiroshima with a burnt out fire engine amidst the rubble after the US dropped an atomic bomb on August 6, 1945. (Photo by Keystone/Getty Images)

Residents wander cleared streets bisecting the ruins of buildings reduced to piles of rubble by the atomic bomb, dropped a few months earlier..Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Hiroshima in ruins following the atomic bomb blastHiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Flattened neighborhood blgs. reduced to complete rubble by atomic bomb blast a few mos. after the US attack that ushered in an end to WWII.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Flattened neighborhood blgs. reduced to complete rubble by atomic bomb blast a few mos. after the US attack that ushered in an end to WWII..Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Hiroshima in ruins following the atomic bomb, dropped at end of WWII.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Hiroshima in ruins following the atomic bomb blast.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Remaining shell of structure at epicenter of atomic blast still standing after US dropping of atom bomb in WWII.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Hiroshima, September, 1945. J.R. Eyerman The LIFE Picture Collection/Getty Images

People walking through the ruins of Hiroshima in the weeks following the atomic bomb blast.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Gutted trolley car amid Hiroshima ruins a few months after the dropping of the atomic bomb by the US, bringing a swift Japanese surrender and an end to WWII. (Photo by Bernard Hoffman/Life). October 1945

August 1945: The twisted wreckage of a theatre, located 800m from the epicentre of the atomic explosion(Getty)

A destroyed streetcar sits on the tracks as people walk and bicycle past at the Kamiyacho intersection in Hiroshima, Japan, some time after the atomic bomb was dropped on the city. (AP Photo/Hiroshima A-Bomb Museum)

Hiroshima in ruins following the atomic bomb blast.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Two people walk on a cleared path through the destruction resulting from the Aug. 6 detonation of the first atomic bomb, Sept. 8, 1945. (AP Photo/U.S. Air Force)

Flattened neighborhood blgs. reduced to complete rubble by atomic bomb blast a few mos. after the US attack that ushered in an end to WWII.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

The area around the Sangyo-Shorei-Kan (Trade Promotion Hall) area of Hiroshima is laid waste, after an atomic bomb exploded within 100 meters of here in 1945. (AP Photo)

A man looks through two pillars -- all that remain of a once luxurious house in Hiroshima, Sept. 7, 1945.  (AP Photo/ACME/Stanley Troutman)

A man wheels his bicycle thorough Hiroshima, days after the city was leveled by an atomic bomb blast, Japan. The view here is looking west-northwest, about 550 feet from where the bomb landed, known as X, on August 6, 1945. (Photo by Keystone/Getty Images)

About one month after the dropping of the first atomic bomb on Aug. 6, 1945, an allied correspondent examines the landscape of destruction at Hiroshima, Japan. (APN Photo/AP)

An unidentified man stands next to a tiled fireplace where a house once stood in Hiroshima, Japan, on Sept. 7, 1945.  (AP Photo/Stanley Troutman)

September 1945: A Japanese soldier walks through a levelled area of the city (National Archives)

A few steel and concrete buildings and bridges are still intact in Hiroshima after the Japanese city was hit by an atomic bomb by the U.S., during World War II Sept. 5, 1945. (AP Photo/Max Desfor)

All but a few scattered structures in this section of Hiroshima, Japan, have virtually disappeared in this aerial view after the August 6 atomic bomb was dropped on the city. This is the first original aerial view of the damage done by the nuclear bomb, released Sept. 1, 1945. (AP Photo/US Air Force)

An aerial view of Hiroshima showing the devastation caused by a single atomic bomb(Getty)

6 August 1945: An aerial view of the damage at Hiroshima shortly after the atomic bomb was dropped(Keystone/Getty Images)

Ruins of Hiroshima after the atomic bomb blast. (Photo by George Silk/Life). September 1945

A pall of smoke lingers over this scene of destruction in Hiroshima, Japan, on Aug. 7, 1945, a day after the explosion of the atomic bomb. (AP Photo)

Twisted metal and rubble marks what once was Hiroshima, Japan's most industrialized city, seen some time after the atom bomb was dropped here.  (AP Photo)

The shell of a building stands amid acres of rubble in this view of the Japanese city of Hiroshima, Aug. 8, 1945. (AP Photo/Mitsugi Kishida)

High-angle view of a section of the city of Hiroshima after the US atomic bombing on August 6, 1945. (Photo by Keystone/Getty Images)

The atomic bomb attack on the Japanese city of Hiroshima, left this mass of twisted steel and this gutted building standing in acres of desolation, Sept. 8, 1945. (AP Photo

Barber shop diminished to rubble except by some fluke of the Atomic blast, still has its tiled washstand & enameled barber chair a few mos. after the US attack that ushered in an end to WWII.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Only a handful of buildings remain standing amid the wasteland of Hiroshima, Sept. 8, 1945, the Japanese city reduced to rubble following the first atomic bomb to be dropped in warfare. (AP Photo)

Two months after the U.S. dropped an atomic bomb on Hiroshima, the Japanese city was still in ruins in Oct., 1945.YOSHIMI NAKAME/AFP/Getty Images

Hiroshima ruins a couple of months after the dropping of the atomic bomb by the US, bringing a swift Japanese surrender and an end to WWII.Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

Hiroshima in ruins following the atomic bomb blast. Hiroshima, Japan. October 1945 Photographer:Bernard Hoffman

 Atomic bomb damage in Hiroshima. (Photo by Hulton Archive/Getty Images)

This file picture dated 1945 shows the devastated city of Hiroshima after the first atomic bomb was dropped by a US Air Force B-29 on August 6, 1945. AFP PHOTO / FILES ( STR/AFP/Getty Images)

Devastation at Hiroshima, after the atomic bomb was dropped. The building on the right was preserved as the Hiroshima Peace Memorial, Atomic Bomb Dome or Genbaku Dome.(Photo by Keystone/Getty Images)

The remains of the barracks at the Japanese Army Divisional Grounds, 4200 feet from where the atomic bomb landed at Hiroshima. (Photo by Keystone/Getty Images)

Wreckage of buildings in Hiroshima after the dropping of the atomic bomb (August 1945). (Photo by Keystone/Getty Images)

Mother and child in Hiroshima, Japan, December 1945. Alfred Eisenstaedt Time & Life Pictures/Getty Images

Nagasaki

Nagasaki, Japanese city on which the second operational atomic bomb was dropped. Nicknamed 'Fat Man' (a reference

to Churchill), the bomb, which used plutonium 239, was dropped by parachute at 1102 on 9 August by an American

B29 bomber from the Pacific island of Tinian.

The bomb exploded about 500 m. Above the ground and directly beneath it (the hypocentre) was a suburb of schools,

factories, and private houses.

About 73,884 were killed and 74,909 injured, with the affected survivors suffering the same long-term catastrophic results

of radiation and mental trauma as at Hiroshima.

A mushroom cloud billows over Nagasaki after the atomic bomb was dropped on the city on 9 August 1945(Reuters)

The radioactive plume from the bomb dropped on Nagasaki is seen from 9.6km away, in Koyagi-jima(Nagasaki Atomic Bomb Museum/Getty Images)

The remnants of a Shinto shrine in Nagasaki(Nagasaki Atomic Bomb Museum)

24 September 1945: Battered religious figures lie in the rubble of a destroyed temple on a hill above Nagasaki(US National Archives)

Devastation is seen in the city of Nagasaki after the atomic bomb was dropped(US National Archives)

 Urakami Cathedral (Roman Catholic), Nagasaki, September, 1945. Bernard Hoffman—The LIFE Picture Collection/Getty Images

Nagasaki, Japan, September 1945. Bernard Hoffman The LIFE Picture Collection/Getty Images

The landscape around Urakami Cathedral, Nagasaki, September, 1945. Bernard Hoffman The LIFE Picture Collection/Getty Images

A Japanese woman is seen with a child in traditional Japanese clothing after they survived the atomic bomb dropped on Nagasaki on Aug. 6, 1945. Three days later, their faces are marked with burns by the heat of the explosion. Nagasaki was attacked three days after an atomic bomb was dropped on Hiroshima, in which 140,000 people were killed or died within months. Japan surrendered on Aug. 15, 1945, ending World War II.AP Photo

The Urakami Cathedral, which was destroyed by the atomic bombing of Nagasaki on August 9, 1945, is seen in Nagasaki, southwestern Japan, in this undated handout photo taken by Shigeo Hayashi and distributed by the Nagasaki Atomic Bomb Museum. Reuters

The south face of Urakami Cathedral, which was destroyed by the atomic bombing of Nagasaki on August 9, 1945, is seen in Nagasaki, southwestern Japan, in this undated handout photo taken by Hisashi Ishida and distributed by the Nagasaki Atomic Bomb Museum. Reuters

Nagasaki, September, 1945. Bernard Hoffman The LIFE Picture Collection/Getty Images

The etched shadow of railings are seen imprinted on the road surface of Yorozuyo Bridge, due to the heat of the atomic bombing of Hiroshima on August 6, 1945, in Hiroshima, in this undated handout photo taken by the US Army and distributed by the Hiroshima Peace Memorial Museum. Reuters

A white silhouette on a Hiroshima bridge shows an area that wasn't scorched by the bomb. It was reportedly the outline of a person's shadow -- someone who was shielded from the blast's heat rays by another person. Keystone/Getty Images

Human Shadow Etched in Stone.A person sitting on the bank steps waiting for it to open was exposed to the flash from the atomic bomb explosion. Receiving the rays directly from the front, the victim undoubtedly died on the spot from massive burns. The surface of the surrounding stone steps was turned whitish by the intense heat rays. The place where the person was sitting remained dark like a shadow. Keystone / Getty Images

A visitor casts a shadow on the ground at Peace Park in Nagasaki, southwestern Japan, July 31, 2015. (Photo by Issei Kato/Reuters)

A couple casts shadows on a cenotaph to the mobilized students in Hiroshima, western Japan July 28, 2015. (Photo by Issei Kato/Reuters)

A visitor holding a sunshade casts a shadow on the ground at the Peace Memorial Park in Hiroshima, western Japan July 29, 2015. (Photo by Issei Kato/Reuters)

end

A Hiroshima resident riding a bicycle casts a shadow on the ground as he cycles past the Atomic Bomb Dome in Hiroshima, July 29, 2015.

cast The long shadows of Hiroshima and Nagasaki, 70th anniversary of atomic bombing

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