- 4 hours ago
Some moments don't just change history — they redefine what humanity is capable of. Join us as we explore the cataclysmic atomic bombings of Hiroshima and Nagasaki, the decisions that led to them, and the consequences that still echo today. From the Manhattan Project to the nuclear taboo, these are the events that made the world stand still.
Category
🗞
NewsTranscript
00:00At 8.15 a.m. on the 6th of August 1945, the United States dropped an atomic bomb on the
00:06Japanese city of Hiroshima.
00:08By the summer of 1945, World War II had already cost millions of lives.
00:13Nazi Germany had surrendered, but the Pacific War raged on.
00:17It was defined by brutal island fighting, civilian casualties, and a stubborn Japanese empire.
00:22American forces had already firebombed dozens of cities, including Tokyo.
00:27The air raids were brutal, and both sides were preparing for an apocalyptic invasion of Japan.
00:33Then, in early August, the war changed forever.
00:47This is WatchMojo.
00:48Today we take a closer look at the cataclysmic atomic bombings of Hiroshima and Nagasaki,
00:53the decisions that led to them, and the consequences that still shape the world.
01:11In the final months of the war, Hiroshima existed in a strange limbo.
01:15Many Japanese cities were reduced to ash by sustained firebombing campaigns, but Hiroshima remained largely intact.
01:23Air raid sirens haunted the city, yet major attacks never came, leaving residents in a perpetual state of uneasy normality.
01:30The population is thrown into a panic.
01:33A million people are left homeless.
01:35The survivors flee into the countryside as their cities are turned into rubble.
01:39That sense of being spared by the war was not accidental.
01:42For various reasons, firebombing was not a viable option.
01:46Thus, Hiroshima was left untouched, preserving it as a pristine target,
01:50where the effects of a single atomic weapon could be clearly observed and measured.
01:54This calm before the nuclear storm would only serve to heighten the scale and shock of the city's eventual devastation.
02:01The first target is chosen.
02:04Hiroshima.
02:05A military and industrial city.
02:08The decision is final.
02:10Elsewhere, the war had reached a breaking point.
02:13By the summer of 1945, fighting in Europe had officially ended, but the Pacific conflict had devolved into a grinding,
02:21bloody stalemate.
02:22Island battles like Iwo Jima and Okinawa showed just how costly every mile toward Japan would be.
02:28Later called the Typhoon of Steel, Okinawa alone left tens of thousands of soldiers and civilians dead.
02:34American military leaders were deeply alarmed.
02:37If an invasion of mainland Japan followed a similar pattern, their forces would be sent into a meat grinder.
02:43Casualty projections ran into the millions for both sides.
02:46Japan's leadership, meanwhile, was bitterly divided between seeking peace and fighting on.
02:52Each side faced the same question.
02:54How much destruction were they willing to endure to achieve victory?
02:58Why did the Japanese continue a hopeless war?
03:01The answer, in part, lies in the interpretation of two words.
03:06Unconditional surrender.
03:08Faced with the prospect of catastrophic losses, American leaders already had another option in motion.
03:14The Manhattan Project was a vast and intensely secret scientific and industrial effort spread across the United States.
03:20Tens of thousands of workers and scientists labored at remote sites.
03:24Most were completely unaware of what they were building or why.
03:28Even many of the project's leading minds understood only fragments of the overall effort.
03:32I don't know if we can be trusted with such a weapon.
03:38But I know the Nazis can't.
03:45We have no choice.
03:47By mid-1945, the secrecy had paid off.
03:50A weapon of unprecedented power existed, unknown to the enemy.
03:54Ready just as the war reached its most desperate moment.
03:57Still, the bomb's creators harbored deep fears, including early concerns, later dismissed,
04:03that its detonation might ignite the atmosphere and end the world itself.
04:08When we detonate an atomic device, we might start a chain reaction that destroys the world.
04:16So here we are, huh?
04:18With the atomic bomb ready, American leaders moved to apply pressure without revealing their hand.
04:23In late July 1945, President Harry S. Truman joined allied leaders in issuing the Potsdam Declaration,
04:30which had laid out the terms for Japan's surrender.
04:33The language was stark and foreboding.
04:35It warned of prompt and utter destruction should Japan refuse,
04:38without explicitly naming the weapon behind the threat.
04:41There can be no peace in the world until the military power of Japan is destroyed.
04:48Truman knew what he possessed, even if much of the world did not.
04:51But it was the West's final diplomatic warning, before words gave way to nuclear force.
04:56But only surrender can prevent the kind of ruin which they have seen come to Germany
05:02as a result of continued, useless resistance.
05:06Japan's leadership, meanwhile, debated how to respond,
05:10parsing the declaration through layers of politics, military strategy, and national pride.
05:16Behind the scenes, Foreign Minister Shigenori Togo urged patience.
05:20He hoped the Soviet Union might mediate more favorable surrender terms.
05:24Sadly, his hopes never made it to Washington.
05:27Japan's public response to the Potsdam Declaration instead hinged on a single, fateful word.
05:33Officials used mokutsatsu, a term that can mean to withhold comment.
05:38Historians also speculate that if Prime Minister Suzuki Kantaro had given a specific response like,
05:46we have not reached any decision yet, or I will have a statement after the cabinet meeting,
05:53the horrible consequences of the inauspicious translation could have been avoided.
05:58It can also imply dismissive silence.
06:02Allied translators rendered it as an outright rejection,
06:05choosing to believe the latter meaning rather than the former.
06:08Whether makutsatsu truly sealed Japan's fate remains debated by historians.
06:13If so, it was a disastrous error that led to catastrophe.
06:17As diplomats argued over memos and language, generals and admirals finalized their targets.
06:22Hiroshima was not chosen at random.
06:24It held military headquarters, industrial facilities, and key transportation links.
06:30Beyond the symbolism of a nuclear attack, Hiroshima was a strategically significant target.
06:35Just as importantly, the city had been largely spared from earlier bombing,
06:39leaving its infrastructure intact.
06:41That made Hiroshima an ideal site for assessing the atomic bomb's effects with cold, scientific clarity.
06:48A single detonation over a largely clean city would make the bomb's destructive power undeniable.
06:53It was a message to both Imperial Japan and any potential future enemies of the United States.
06:59Even as targets were finalized, the atomic bomb itself still needed to reach the Pacific.
07:04In late July 1945, the heavy cruiser USS Indianapolis completed a top-secret mission,
07:11delivering vital components of the atomic bomb to the island of Tinian.
07:15Its crew knew the cargo was important, but not what it was.
07:19To them, it was simply another classified assignment.
07:22After a successful drop-off, the Indianapolis was torpedoed by a Japanese submarine on its return voyage.
07:28It was coming back from the island of Tinian to Lady and just delivered the bomb, the Hiroshima bomb.
07:381,700 men went into the water.
07:41The vessel went down in 12 minutes.
07:43It sank in just 12 minutes.
07:46Nearly 900 men were left adrift in the open ocean.
07:49Exposure, dehydration, and shark attacks killed hundreds before rescue arrived.
07:53The tragedy was kept quiet during wartime, but it remains one of the deadliest naval disasters in U.S. history.
07:59The first morning, there was a count.
08:02We believe the total was close to 150.
08:04And of that group, 67 survived.
08:07Four and a half days after the sinking of the Indianapolis,
08:10a U.S. naval plane spots what is remaining of the Indy's crew.
08:15Rescuers finally arrived.
08:17Once the bomb's components reached Tinian, they were assembled into a weapon called Little Boy.
08:21Unlike later nuclear designs, Little Boy was a uranium gun-type bomb.
08:26It was triggered by firing one piece of enriched uranium into another to achieve critical mass.
08:31It was a comparatively simple design, and a terrifyingly untested one.
08:36Scientists were confident it would work,
08:38but the weapon had never been detonated in a full-scale test before Hiroshima.
08:42There would be no rehearsal.
08:44The bomb was loaded aboard the B-29 bomber Enola Gay.
08:47Its crew knew they were part of a historic mission,
08:50but they were not fully briefed on the scale of destruction the weapon would unleash.
08:54It was dropped from a height of 31,060 feet, 9,470 meters.
08:59The Enola Gay turned around and the bomb detonated 43 seconds later,
09:041,968 feet, 600 meters above the ground.
09:08On the morning of August 6, 1945,
09:11the Enola Gay approached its target under clear skies.
09:14At precisely 8.15 a.m. local time, the bomb bay doors opened,
09:18and Little Boy fell toward Hiroshima.
09:21The aircraft immediately executed a sharp, pre-planned evasive turn,
09:25designed to put as much distance as possible between the crew and the blast.
09:2943 seconds later, the bomb detonated roughly 1,900 feet above the city.
09:34A blinding flash lit the sky,
09:37followed by a shockwave that rippled outward at unimaginable speed.
09:40The world will note that the first atomic bomb was dropped on Hiroshima,
09:45a military event.
09:48We won the race of discovery against the Germans.
09:52Miles away, the crew felt the plane shudder as the explosion caught up to them.
09:57Below, an entire city was transformed in a single irreversible instant.
10:01What was very interesting about Hiroshima was that the atomic bombs detonated over the city,
10:06and what it did, more or less, straight away, was just wipe out the centre.
10:10I mean, it was, if you look at photographs of Hiroshima,
10:13you can just see that it's turned into a kind of desert,
10:15and this vast area in the city centre just ceased to exist in seconds.
10:20In the seconds after the explosion, fires ignited across Hiroshima,
10:25merging into a massive firestorm that consumed entire neighbourhoods.
10:29Survivors wandered through the flattened streets and burning ruins.
10:32Many suffered severe burns, as clothing ignited or skin was scorched by the thermal flash.
10:37They were shell-shocked, struggling to comprehend what had just happened.
10:41Sadly, an even more in city's threat had been unleashed.
10:45Radiation sickness began to appear in the days and weeks that followed.
10:48Baffling doctors, as patients fell ill without visible wounds.
10:52Hair fell out.
10:53Hemorrhaging and internal damage appeared.
10:55People who had initially survived the blast suddenly worsened and died.
10:59The familiar rules of triage no longer applied.
11:02Little Boy had introduced the world to a new kind of suffering.
11:05The war is over.
11:07The world has changed.
11:09As Hiroshima burned, and its survivors struggled to understand what was killing them,
11:14the world learned of the attack through a carefully crafted announcement.
11:17On August 6th, 1945, President Harry S. Truman addressed the public.
11:22In his announcement, the President revealed the use of a new weapon powered by
11:26the basic power of the universe.
11:28To supplement the growing power of our armed forces.
11:32In the present form, these bombs are now in production, and even more powerful bombs are
11:40in development.
11:41It is an atomic bomb.
11:44It is a harnessing of the basic power of the universe.
11:47His statement framed the bombing as a military strike against a Japanese base, emphasizing technological
11:53achievement and strategic necessity.
11:55The human cost went unmentioned.
11:57Truman's words introduced the atomic bomb to the world on his terms, presenting its use
12:02as a grim necessity rather than a choice.
12:05This moment marked the public birth of the atomic age.
12:08What has been done is the greatest achievement of organized science in history.
12:14The shock of the attack did not immediately end the war.
12:17News of Hiroshima's devastation arrived slowly and incompletely, filtered through confusion
12:22and disbelief.
12:23Inside Japan's government, the atomic bombing only intensified debates that were already
12:28deadlocked.
12:29Some leaders saw the destruction as proof that continued resistance was futile.
12:33Others argued the bomb was a one-off weapon that couldn't be replicated, or that surrender
12:38without better terms would doom the nation's future.
12:41The military still hoped to inflict heavy casualties on an invading army to force negotiations from
12:47a position of strength.
12:48Without consensus or a cohesive response, Japan's leadership remained fractured.
12:53As those divisions persisted, time ran out.
12:56As Japan's leadership remained deadlocked, the United States moved ahead with a plan for
13:01a second strike.
13:02The next mission was scheduled for August 9th, just three days after Hiroshima, leaving
13:07little time for reassessment.
13:08The primary target was Kokura, chosen for its military arsenal and industrial value.
13:14Residual smoke from Iwata blew over Kokura, which reduced visibility over the target area.
13:19This forced the crew to divert to and attack Nagasaki.
13:23Kokura was one of the few Japanese cities that was never attacked in World War II.
13:27Conditions on the ground quickly complicated the plan.
13:30Smoke from earlier conventional bombing and heavy cloud cover obscured the aiming point.
13:35After multiple passes over the city, visual targeting required by mission orders proved
13:40impossible.
13:41Fuel was running low.
13:43The crew's standing orders forbade a return with the bomb on board.
13:47They were forced to divert to their secondary target, Nagasaki.
13:50The weapon carried toward Nagasaki was not the same bomb used on Hiroshima.
13:55Fat Man was a plutonium implosive device, far more complex than Little Boy's gun-type
14:00design.
14:01Instead of relying on relatively straightforward engineering, it used precisely shaped explosive
14:07lenses to compress a plutonium core into a supercritical mass.
14:11This was the design scientists had tested at Trinity, and the one they believed represented
14:16the future of nuclear weapons.
14:17Fat Man was the world's deadliest proof of concept.
14:20In confirming that such weapons could be built and used repeatedly, it marked nuclear warfare
14:26as a terrifyingly scalable technology.
14:29The shock of Hiroshima had frozen the world in place.
14:31Fat Man made it clear there was no going back.
14:56Fat Man detonated above Nagasaki, unleashing a different kind of atomic destruction.
15:02The plutonium implosion design was far more complex than Little Boy's gun-type bomb.
15:07As a result, the blast was startlingly efficient.
15:11Temperatures at the hypocenter soared unimaginably, instantly killing people closest to ground zero.
15:17Intense thermal radiation left human silhouettes, known as atomic shadows, burned into surfaces
15:23where victims once stood.
15:24In Nagasaki, utter silence.
15:296.7 square kilometers of the city have been reduced to rubble.
15:34More than 40,000 men, women, and children are vaporized.
15:39The pressure wave crushed reinforced concrete structures and ignited fires across the city.
15:45Tens of thousands were killed outright, with many more suffering catastrophic burns and
15:50radiation exposure.
15:51The destruction of Nagasaki was shaped as much by geography as by nuclear physics.
15:56Unlike Hiroshima's relatively flat layout, Nagasaki was spread across steep hills and narrow valleys.
16:02The bomb detonated over Yurikami Valley, concentrating devastation there.
16:07Ridge lines disrupted the blast's outward force, shielding some districts from the full impact,
16:12and reducing damage beyond the valleys.
16:15Factories, homes, and the Yurikami Cathedral near the hypocenter were obliterated,
16:19while neighborhoods just beyond the hills suffered comparatively less structural destruction.
16:24You can see the prison bars bent from the blast.
16:26The 25-centimeter-thick reinforced concrete walls stood no chance to the force of the atomic bomb.
16:34This uneven pattern sometimes leads to the misleading claim that Nagasaki was spared.
16:40It wasn't.
16:41Tens of thousands still died.
16:42Entire communities were erased, and radiation spread far beyond the blast zone.
16:47The fire hit the ground, the damage was huge.
16:52It was like a woman's blood.
17:02Given Japan's lack of immediate response to Hiroshima,
17:05the U.S. military didn't assume that Nagasaki would end the war.
17:09By mid-August 1945, preparations for further atomic strikes were already underway.
17:14A third atomic bomb was expected to be ready for use around August 19th, just 10 days after Nagasaki.
17:21Production of additional plutonium cores continued, with more bombs projected for September and beyond.
17:27Potential targets discussed included Kokora, Niagata, and other industrial centers that had not yet been destroyed.
17:34Nothing in the planning indicated a pause for diplomatic or moral reassessment.
17:38The U.S. military anticipated continued atomic strikes if Japan did not surrender,
17:44viewing them as a preferable alternative to a deadly full-scale invasion.
17:48But it is clear that the U.S. government hesitated to use the third A-bomb,
17:52for no authorization was given at this time to actually fly it to Tinian.
17:58The earliest U-state of the 19th of August remained on the table, however, with no formal decision taken as
18:05yet.
18:05The bombing of Nagasaki helped break the deadlock at the heart of Japan's leadership.
18:10Faced with a second atomic strike, and the clear possibility of more,
18:14Emperor Hirohito intervened directly.
18:17He broke the Supreme War Council's stalemate, despite continued military resistance.
18:21On August 15th, 1945, he addressed the nation in a pre-recorded radio broadcast,
18:27the first time most Japanese citizens had ever heard his voice.
18:30He did not mention Hiroshima or Nagasaki by name, nor did he explicitly say surrender.
18:36Instead, the emperor urged the nation to endure the unendurable to preserve the future.
18:41For listeners, the moment was disorienting and final.
18:45Confusion gave way to grief, shock, and quiet resignation.
18:48The war had ended, but the aftermath had only just begun.
18:52Estimates of how many people died in the wake of Hiroshima and Nagasaki vary widely,
18:57as conditions defied normal record-keeping.
19:00Some victims near the hypocenters were instantly killed, leaving no remains to count.
19:05Others were buried under collapsed buildings, or vanished in the chaos.
19:09Thousands more survived the initial blasts, only to die days, months, or years later.
19:14Civil records were destroyed, families were wiped out, and the data became unreliable.
19:19As a result, casualty figures depend on where the timeline ends.
19:23The day of the blast, the end of 1945, or decades later.
19:28For these unfortunate souls, it's a daily fight for survival.
19:34One of them says,
19:37I can't stand it anymore, being hungry day after day.
19:41It's only thanks to the kindness of strangers that I haven't starved to death.
19:45Conservative estimates placed the total deaths at roughly 200,000.
19:49Broader counts, that include long-term effects, rise significantly higher.
19:54The bombings were less single events, and more ongoing human disasters.
19:59For those who survived Hiroshima and Nagasaki, the end of the war did not mean an end to hardship.
20:05Known as Hibakusha, bomb-affected people, survivors lived with lasting physical and psychological scars.
20:30Many developed chronic illness, cancers, or lifelong disabilities linked to radiation exposure.
20:36Hibakusha often faced deep social stigma, feared as contagious or genetically tainted.
20:42Some were denied jobs, others struggled to marry, their survival treated as an object of shame, rather than a miracle.
20:49For decades, many stayed silent, carrying their trauma alone.
20:53He said to the soldier who's clutching me in his arm, he said, water, water, please water.
21:02And the soldier just...
21:06Their testimonies were vital, as powerful institutions moved to control how their suffering was seen, studied, and understood.
21:13In the years after the bombings, Western attention turned not only to rebuilding Japan, but to studying its survivors.
21:21Under the US-led occupation, American scientists launched long-term medical research on Hibakusha.
21:27They tracked radiation's effects for decades, with treatment often lagging behind observation.
21:32At the same time, occupation authorities imposed strict censorship on Japanese media.
21:38They restricted photographs, film, and first-hand accounts of the devastation.
21:42In the West, early reporting emphasized scientific advancement, and the bomb's role in ending the war.
21:48Graphic evidence of human suffering remained largely unseen.
21:52Even foreign journalists faced limits, until cracks began to form in the narrative.
21:56How the world understood Hiroshima and Nagasaki was shaped as much by policy and press control as by the events
22:03themselves.
22:03International Jamborees provided Japanese scouts with an opportunity to meet and work with boys of other nations, with great success.
22:12Almost as soon as the war ended, the moral debate began.
22:15Looking back now, do you think that our country's use of the bomb was necessary?
22:21Supporters of the atomic bombings argued they saved vast numbers of American and Japanese lives by avoiding a full-scale
22:27invasion of Japan.
22:29Critics countered that Japan was already close to collapse.
22:32They were severely weakened by the naval blockade, conventional bombing, and the Soviet Union's entry into the theater.
22:38I think the bomb was an enormous relief.
22:42The war had started in 1939.
22:45It had seen the death of tens of millions.
22:50It had seen brutality and degradation, which had no place in the middle of the 20th century.
23:00Some pointed to internal Japanese peace feelers, however limited or conditional.
23:06Others emphasized the bomb's unprecedented civilian toll.
23:09Over time, the debate only widened.
23:11Historians, veterans, scientists, and survivors all weighed in, often reaching sharply different conclusions.
23:18Whether the bombings were necessary depends largely on which evidence is privileged.
23:23Military projections, diplomatic signals, or moral judgment.
23:26I've tried to talk about the hopeful things.
23:29The unhopeful ones jump to everyone's mind.
23:33Will the Chinese change their views of human destiny and of the relations between them and us,
23:40before or after they have the power to make major nuclear war?
23:45The atomic bombings helped bring World War II to an end, and then opened an international can of worms.
23:51By demonstrating that a single weapon could erase a city, the United States fundamentally altered how war could be fought.
23:58Other nations took notice immediately, recognizing that nukes would redefine global power.
24:03Allies and adversaries alike sought nuclear parity.
24:06None were more desperate than the Soviet Union, which accelerated its own atomic program in the war's aftermath.
24:12As the fear of global annihilation grows, so does the scale and range of the planes designed to drop the
24:19bomb.
24:21The Americans are also considering expanding aviation production with priority for long-range bombers.
24:27Work on the Boeing Stratofortress B-52 is in full swing.
24:30What followed was a decades-long arms race defined by deterrence and the logic of mutually assured destruction during the
24:37Cold War.
24:38Possessing nuclear weapons was meant to prevent attack by making retaliation unthinkable.
24:43Hiroshima and Nagasaki were both a warning and a grim promise of power.
24:48The nuclear threat did not remain a two-player game for long.
24:51Over the decades, atomic weapons spread beyond the United States and the Soviet Union.
24:55The world became a much more dangerous, nuke-filled place.
24:59The United Kingdom, France and China developed their own arsenals, followed later by India and Pakistan.
25:05Israel is widely believed to possess nuclear weapons, while North Korea has tested them openly.
25:11By the 1980s, the US became aware that North Korea was using spent nuclear energy fuel on creating weapons.
25:17Then, in the 90s, North Korea signed the Nuclear Non-Proliferation Treaty,
25:21despite secretly building weapons and delaying inspections from the International Atomic Energy Agency.
25:27Today, thousands of warheads still exist, many on high alert.
25:32The so-called nuclear taboo has limited their use, but the threat remains.
25:36Some of the most dangerous disputes on Earth can be between two nuclear powers,
25:40potentially willing to annihilate one another.
25:43However, while these treaties are useful,
25:45most of the world's nuclear-armed states store their nuclear weapons inside submarines,
25:50which means they are everywhere and anywhere,
25:52secretly hidden inside the oceans at any given time.
25:55This acts as one of the strongest deterrents,
25:57as even if a country's launch facilities were completely destroyed,
26:00the submarines lie ready, waiting to retaliate and are impossible to destroy.
26:04As nuclear weapons spread, opposition to them grew stronger.
26:08Proliferation and the logic of mutually assured destruction fueled moral resistance.
26:13Groups like the International Committee of the Red Cross point to Hiroshima and Nagasaki
26:17as proof that nuclear weapons cannot be used without mass civilian suffering.
26:22Burns, radiation sickness, collapsed hospitals, and poison environments overwhelm any possible response.
26:28From this view, nuclear weapons are incompatible with the core principles of international humanitarian law.
26:35This framing reshaped disarmament efforts, shifting the debate away from deterrence and toward real-world consequences.
26:41Thanks to Hiroshima and Nagasaki, those consequences are not abstract.
26:46They are embedded, literally, in the cities and people where the bombs fell.
26:51Those cities choose to remember.
27:09After the war, Hiroshima was rebuilt but its citizens chose to never forget.
27:15Remembrance became part of the city's identity.
27:17Sites like the Hiroshima Peace Memorial Park, museums, and preserved ruins anchor that mission.
27:24Each year, ceremonies mark the moment of detonation.
27:27Names are read, bells are rung, and silence is observed.
27:31Nagasaki followed a similar path, blending mourning with advocacy for peace.
27:36Both cities have chosen to act as stewards of history, advocating for nuclear disarmament and the abolition of nuclear weapons.
27:43Their trauma is not hidden or sanitized.
27:45It is curated, taught, and shared.
27:48Memory has become a civic duty.
27:50Even though Hiroshima is a forward-thinking city, completely reborn,
28:01something like this can never happen again.
28:07Since 1945, nuclear weapons have not been used in war, though history is littered with close calls and near-misses.
28:14This restraint is often called the nuclear taboo, which makes nuclear use broadly unacceptable.
28:20Some point to morality, shaped by the memory of Hiroshima and Nagasaki.
28:23Others credit fear, knowing any use could spiral into catastrophe.
28:28Strategy plays a role, too.
28:29After all, deterrence rewards restraint.
28:32But recently, the taboo has been tested by terrifying rhetoric.
28:36Vladimir Putin has threatened battlefield nuclear use against Ukraine.
28:40Donald Trump repeatedly treated nuclear force as a bargaining tool, boasting about deployments and questioning arms control norms.
28:48North Korea has normalized nuclear threats and routine messaging.
28:51None of this broke the taboo, but each moment chipped away at it.
28:55For decades, the nuclear taboo has been held together by fear, strategy, and memory.
29:00That memory, however, is slipping away.
29:02Over a 50-year period, America conducted 1,054 official nuclear tests,
29:08with the fallout killing an estimated 500,000 people and causing an epidemic of cancers.
29:14These dangers, combined with the threat of nuclear warfare, led to the Comprehensive Nuclear Test Ban Treaty,
29:21which the US signed in 1996, but never ratified.
29:25Time is thinning the number of people who can say, I was there.
29:29The average age of hibakusha now stretches into the late 80s and 90s.
29:34Every year, fewer survivors remain to speak about their experiences in their own voices.
29:39As those voices fade, history risks becoming easier to forget, dismiss, or worse, rewrite.
29:46Today, this group of students from Princeton University is, for the first time,
29:51coming face to face with a Hiroshima survivor, and the horrors she witnessed.
29:56We're taught this narrative that, you know, this great scientific instrument was dropped on Hiroshima.
30:03There was a flash and the war ended.
30:05But it's just been so surreal and, I think, in a lot of ways, tragic.
30:11It is easier to argue in abstractions without first-hand witnesses to the horrors.
30:17Museums preserve artifacts.
30:18Archives preserve words.
30:20But neither can replace living memory.
30:23When memory is relegated to dusty history books,
30:26the lessons of Hiroshima and Nagasaki become easier to ignore.
30:30I have to do whatever I can do, as long as I live.
30:35Even as first-hand memories fade,
30:37the debate over Hiroshima and Nagasaki has remained highly charged.
30:40In some way, as it has grown more heated in recent years.
30:44The question of necessity now often reflects modern political identity as much as historical analysis.
30:50Generations removed from 1945 sometimes frame the bombings as proof of national strength or strategic brilliance.
30:58Others push back, viewing the attacks as moral stains.
31:01Revisionists claim that this reduced the shock of the atomic bomb,
31:04since the Japanese leadership already expected mass death from more conventional bombing or an invasion.
31:10The Japanese military didn't really react much to the first atomic bomb,
31:14and even doubted an atomic weapon had been used at all.
31:18Public opinion polls show the divide persists, shaped by age, ideology, and national identity.
31:24The argument plays out in textbooks and museums,
31:27but also in speeches, social media, and pop culture,
31:31far from the cities where the consequences were lived.
31:33Hiroshima and Nagasaki are not abstract events in a history book,
31:38but living evidence of humanity crossing a dangerous boundary.
31:41In 1945, the world learned that humanity is capable of swift, fiery destruction on an unprecedented scale.
31:48Since then, nuclear weapons have spread across the globe.
31:52Disarmament has come in fits and starts at best.
31:55Near misses remind us of how much this uneasy peace has depended on restraint, judgment, and luck.
32:01The conventional wisdom outside Japan is that the destruction of this city was a necessary evil
32:07that brought an abrupt end to the war.
32:09At the same time, nationalist rhetoric and power politics continue to test those limits.
32:14The bombing of Hiroshima and Nagasaki are more than ruins.
32:18They drew a line in history, one that says, beyond this, everything changes.
32:23We live with that knowledge every day, hoping the line holds and that it is never crossed again.
32:28Now I am become Death, the destroyer of worlds.
32:35I suppose we all thought that, one way or another.
32:38What do you think history should remember most about the atomic bombings?
32:42Is it the military context, the human cost, or the lessons we still haven't fully learned?
32:47Let us know in the comments below.
Comments