80 years since US dropped atom bombs on Hiroshima and Nagasaki: 5 facts about the attacks that changed history
On 6 August 1945, the United States dropped the first atomic bomb on Hiroshima, followed by a second attack on Nagasaki three days later. Together, the bombings claimed over 200,000 lives and forever altered the course of warfare, diplomacy, and science.
Here are five key facts to understand the magnitude and legacy of the bombings:
On the morning of 6 August 1945, a US B-29 bomber named Enola Gay released an atomic bomb dubbed 'Little Boy' over the city of Hiroshima. The device exploded approximately 600 metres above the ground, unleashing a blast equivalent to 15,000 tonnes of TNT.
Around 140,000 people were killed by the end of that year.
Just three days later, on 9 August, the US dropped a second bomb—'Fat Man'—on Nagasaki, killing an estimated 74,000 more. These remain the only two times nuclear weapons have been used in warfare.
In Hiroshima, temperatures near the blast centre reached a staggering 7,000°C, incinerating everything in a three-kilometre radius. Survivors recalled seeing a massive fireball and being thrown through the air by the blast.
Entire neighbourhoods, largely built of wood, were engulfed in firestorms that consumed all available oxygen, causing death by asphyxiation.
One witness from Nagasaki, Koichi Wada, recalled: 'I remember the charred bodies of little children lying around the hypocentre area like black rocks.'
Many in Japan who survived the initial explosions suffered from acute radiation sickness—nausea, hair loss, internal bleeding, and vomiting. Over the years, survivors, known as hibakusha, faced higher risks of leukaemia and other cancers.
Yet, a Japanese-US research study found no significant rise in congenital disabilities among their children.
What was the global aftermath of Hiroshima & Nagasaki?
The bombings led to Japan's surrender on 15 August 1945, effectively ending World War II. However, the attacks sparked global debate over the ethics and necessity of nuclear weapons. While some argue the strikes averted even greater loss of life by avoiding a land invasion, survivors continue to bear the trauma—both physical and psychological.
Many hibakusha faced social stigma and were ostracised, particularly in marriage, due to myths surrounding radiation.
Survivors and their supporters have become global advocates for nuclear disarmament. Groups like Nihon Hidankyo, which won the Nobel Peace Prize, continue to campaign against nuclear weapons.
In recent years, global leaders have acknowledged the suffering. Pope Francis met hibakusha in 2019, calling nuclear arms 'a crime against humanity.' In 2016, Barack Obama became the first sitting US president to visit Hiroshima, embracing survivors though offering no apology.
This year, in a significant gesture, Russia is among the 100 nations expected to attend Nagasaki's commemorative ceremony—marking its first invitation since the war in Ukraine began.
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