SHORT HISTORY, LONG ECHOES · B2/C1 · 50 min

Hiroshima & Nagasaki

Two cities, two mornings in August 1945 — and a question the world has never stopped asking.

Need an easier version? Read this lesson at A2/B1 level →

Today: a sombre, important story — the only two times nuclear weapons have ever been used in war — and the grammar to weigh it honestly: the modal perfects we reach for when we judge a past decision (should have, could have, needn't have).
Warm up — six words worth carrying with you. Each one comes from an earlier story in the series. Met it before? Say what it means and use it in a sentence of your own. New to you? Even better — it's a useful word to add today. Reveal to check — and follow a link if you'd like to read the story it comes from.
the establishment — from The Kray Twins
What does it mean? Use it in a sentence about power.
the establishment (n) — the powerful people and institutions who run a society and tend to keep things as they are.
a dynasty — from Cleopatra
What does it mean? Name a dynasty you know.
a dynasty (n) — a line of rulers who all come from the same family.
a raid — from The Vikings
What does it mean? Use it about a sudden attack.
a raid (n) — a sudden surprise attack on a place, usually quick and then over.
a grudge — from The Salem Witch Trials
What does it mean? Use it about a long quarrel.
a grudge (n) — a feeling of resentment held against someone for a long time after a wrong.
an heir — from The Romanovs
What does it mean? Use it about inheritance.
an heir (n) — the person who will inherit a title, a throne, or property (the "h" is silent).
to exaggerate — from Marco Polo
What does it mean? Use it about a story someone tells.
to exaggerate (v) — to make something sound bigger, better or worse than it really is.

Now — the words for today's story

Each new word is hidden in a sentence. Read it aloud and say what you think the bold word means from the rest of the sentence — then reveal it and see how close you were.

1. For four long years the two nations had fought, and now one side simply could not go on; with its cities in ruins and its armies broken, it had little choice but to capitulate.
to capitulate (v) — to stop resisting and accept the enemy's terms completely; to give in after holding out.
2. The message left no room to bargain: lay down your weapons by Friday, or face the consequences. It was an ultimatum, not an invitation to talk.
an ultimatum (n) — a final demand, with a serious threat attached if the other side refuses.
3. It fell in silence for the better part of a minute; then, six hundred metres above the streets and never touching the ground, the bomb detonated.
to detonate (v) — to explode, or to set off an explosion with sudden, violent force.
4. When the smoke finally lifted, the rescuers stood in silence: street after street of devastation, with almost nothing left standing for as far as they could see.
devastation (n) — terrible and widespread destruction.
5. In a single, blinding instant the blast did not merely damage the district — it seemed to obliterate it, wiping it from the map as though it had never existed.
to obliterate (v) — to destroy something so completely that no trace of it is left.
6. Most of those caught in the blast were non-combatants: shopkeepers, schoolchildren, mothers, nurses, the ordinary people of an ordinary morning.
non-combatants (n) — people who take no part in the fighting of a war, such as civilians and medical staff.
7. By nightfall the hospitals had stopped trying to count: the casualties ran into the tens of thousands — the dead, the dying, and the injured together.
casualties (n) — people killed or injured in a war, accident or disaster.
8. The danger did not end with the explosion. Long after the fires were out, an invisible radiation lingered in the ruins, and people who had walked away unharmed grew sick weeks later.
radiation (n) — invisible energy given off by certain materials, which can harm the body and cause illness long after exposure.
9. It was a new kind of weapon, unlike any bomb before it: a single atomic bomb that drew its terrible power from splitting the very heart of matter itself.
an atomic bomb (n) — an extremely powerful bomb whose energy comes from splitting atoms; a nuclear weapon.
10. In the aftermath, when the war was finally over, the survivors had to begin again from nothing — rebuilding homes, burying the dead, and learning to live with what had happened.
the aftermath (n) — the period and the situation that follow a terrible event, especially its lasting effects.

Now use them — out loud

Talk it through before we read:
  • Using ultimatum, capitulate, non-combatants and aftermath, predict: what kind of story do you think we're about to read?
  • Which of these words feel especially heavy or painful to you, and why? Choose two and say a sentence about each.

The story, in four parts

This is a difficult history, and we'll treat it with the seriousness it deserves. Read each part. After it, there's a quick comprehension check (try the questions from memory first), then one thing to discuss.

Part 1 — A secret weapon and a final warning

By the summer of 1945 the Second World War in Europe was over. Germany had surrendered in May, but in the Pacific the war went on, and it was savage. Japan would not give in. American commanders looked ahead to an invasion of the Japanese home islands and feared it could cost enormous numbers of lives on both sides.

For years, in deep secrecy, the United States — helped by Britain and Canada — had been racing to build a weapon no one had ever possessed. It was called the Manhattan Project, led on the science side by the physicist J. Robert Oppenheimer. The fear that had started it was that Nazi Germany might build such a bomb first. By July 1945 the project had succeeded: in the New Mexico desert, the world's first nuclear device was tested. It worked.

On 26 July, the Allies issued the Potsdam Declaration — an ultimatum demanding Japan's unconditional surrender, with the alternative described as "prompt and utter destruction." Japan's government did not accept it. The order to use the new weapon went ahead.

Quick check — answer from memory, then reveal:

1. What was the Manhattan Project, and what fear had first set it in motion?

2. What did the Potsdam Declaration demand, and how did Japan respond?

1. A secret American-led programme (with Britain and Canada) to build a nuclear weapon; it began from the fear that Nazi Germany might build one first.

2. It demanded Japan's unconditional surrender, threatening "prompt and utter destruction"; Japan's government did not accept it.

Discuss:
  • The project was begun out of fear of Germany — yet Germany had already surrendered before the bomb was ready. Does that change how you read the decision to use it?

Part 2 — Hiroshima, 8:15 in the morning

On the morning of 6 August 1945, a single American B-29 bomber, the Enola Gay, flew high above the city of Hiroshima. Below, it was an ordinary working morning — people on their way to factories and offices, children outside, a city of some 350,000 going about its day. At 8:15 the aircraft released a uranium bomb nicknamed "Little Boy." It fell for less than a minute, then detonated about 600 metres above the streets.

The blast and the firestorm that followed obliterated the centre of the city in an instant. Tens of thousands of people were killed at once; many more died in the hours and days that followed. The overwhelming majority were civilians. Estimates of those who died in Hiroshima, from the blast and from radiation in the months afterward, range from around 70,000 to 140,000. A new and terrible word entered the world: a single bomb, dropped by a single plane, had destroyed an entire city.

Quick check — answer from memory, then reveal:

1. What was "Little Boy," and what aircraft carried it to Hiroshima?

2. Who made up the great majority of the casualties, and why is that significant?

1. "Little Boy" was the uranium atomic bomb; it was carried by the B-29 bomber the Enola Gay and detonated above the city at 8:15 a.m.

2. The great majority were civilians — ordinary residents, not soldiers — which sits at the heart of the moral debate the bombings still provoke.

Discuss:
  • It was an ordinary morning until 8:15. Why might historians and survivors return so often to that small, exact detail of time?

Part 3 — Nagasaki, and the silence that followed

Three days later, on 9 August 1945, a second bomber set out. Its first target was the city of Kokura, but heavy cloud and smoke hid it from view. The crew turned instead to their alternative target: Nagasaki. There, at 11:02 in the morning, they dropped a plutonium bomb nicknamed "Fat Man." The hills around Nagasaki shielded part of the city, but the destruction was still immense, and an estimated 60,000 to 80,000 people died.

The world had now seen two cities destroyed in three days. On the same day Nagasaki was bombed, the Soviet Union declared war on Japan and invaded Japanese-held Manchuria — another heavy blow. On 15 August 1945, Japan's emperor announced that the country would surrender. The formal surrender was signed on 2 September. The Second World War, the deadliest conflict in human history, was over.

Quick check — answer from memory, then reveal:

1. Why was Nagasaki, rather than Kokura, the city that was bombed on 9 August?

2. Name two things that happened in the days around Nagasaki that pushed Japan toward surrender.

1. Kokura, the first target, was hidden by cloud and smoke, so the crew turned to their alternative target, Nagasaki.

2. The second atomic bombing itself, and the Soviet Union's declaration of war and invasion of Manchuria on the same day; Japan announced surrender on 15 August.

Discuss:
  • The Soviet entry into the war and the second bomb came almost together. Why does it matter, for the debate, which one we think weighed most heavily on Japan's decision?

Part 4 — The aftermath, and the argument that never ends

For the survivors — known in Japan as the hibakusha — the suffering did not end when the war did. Radiation sickness killed people for weeks and months; some developed cancers and other illnesses years, even decades, later. The two cities had to be rebuilt almost from nothing. Today Hiroshima and Nagasaki are living cities again, and each holds a memorial and a yearly ceremony for peace.

Almost eighty years on, the debate about the bombings has never been settled, and it deserves to be heard fairly from both sides. Many argue the bombs were a terrible necessity: that they forced a swift surrender and so prevented an invasion that, by some estimates, could have cost even more lives — Japanese and Allied alike. Others argue they were not justified: that Japan was already close to defeat, that the Soviet entry might have ended the war without them, and that the deliberate destruction of cities full of civilians can never be defended. Could the war have ended another way? Some hold that the second bomb, in particular, need not have been dropped at all. There is no easy answer — only a question the world has carried ever since, and the quiet hope, spoken at those memorials each August, that such weapons should never be used again.

Quick check — answer from memory, then reveal:

1. Why did the suffering of the survivors continue long after the war ended?

2. Summarise, fairly, one argument on each side of the debate about whether the bombings were justified.

1. Radiation caused sickness, cancers and death for months, years and even decades afterward; the cities also had to be entirely rebuilt.

2. One side: the bombs forced a quick surrender and may have prevented an even costlier invasion. The other side: Japan was near defeat (and the Soviet entry may have been decisive), and destroying cities full of civilians cannot be justified. Both are honestly held.

Discuss:
  • The memorials exist partly so the world will not forget. What, in your view, is the most important lesson they are trying to keep alive?

Grammar — Modal Perfects: should have / could have / needn't have

This story ends in a debate, and a debate about the past needs a special set of tools. When we look back and judge a decision — saying it was wrong, or unnecessary, or that things might have gone differently — English uses the modal perfects: a modal verb + have + a past participle. They let you criticise, regret or imagine a past choice without claiming to know for certain what would have happened.

The three you need here:
• should have / ought to have + past participle — regret or criticism of a past choice; the right thing was not done. "The warning should have been taken more seriously." "They ought to have given more time to reply."
• needn't have + past participle — an action that was done, but was unnecessary. "Some argue the second bomb need not have been dropped." (It was dropped — but, they say, it wasn't needed.)
• could have + past participle — a past possibility that was not realised. "Could the war have ended another way?" "A different path could have led to surrender."
Watch the difference — it's the heart of the debate:
• needn't have done = you DID it, but it wasn't necessary. ("They needn't have dropped it" → it was dropped, unnecessarily.)
• didn't need to do often means it wasn't necessary, so you may not have done it at all. Choose needn't have when the action definitely happened and you're judging it after the fact.
• could have done = it was possible but didn't happen. should have done = it was the right thing but didn't happen. Don't mix them up: "could" is about possibility, "should" is about judgement.

1. Choose the right modal perfect

Regret/criticism (should have), unnecessary past action (needn't have), or unrealised possibility (could have)? Write the full form.

1. Critics say the leaders (give / should) Japan more time before the second bomb.

2. Some historians believe the war (end / could) without the bombs at all.

3. They argue the second bomb (drop / needn't, passive) — it added little, they say.

4. With hindsight, the ultimatum (word / ought to, passive) more clearly.

1. should have given (criticism of a choice not made)

2. could have ended (an unrealised possibility)

3. needn't have been dropped (an unnecessary action that nonetheless happened)

4. ought to have been worded (regret/criticism, passive)

2. needn't have vs. could have vs. should have

Read the meaning in brackets and choose the form that matches it exactly.

1. The pilots followed orders; with hindsight some say the mission (fly, passive) at all. (it happened, but was unnecessary)

2. A demonstration on an empty island (offer, passive) first. (a possibility that wasn't taken)

3. Either way, the warning to civilians (be) louder and earlier. (the right thing, not done)

1. needn't have been flown (done, but unnecessary)

2. could have been offered (a possibility not realised)

3. should have been (criticism: the right thing wasn't done)

3. Build your own judgement — finish each line

Complete each sentence about the story with a modal perfect of your own, then read it aloud. There's no single right answer here — but reveal to compare with strong, natural versions.

1. If the Potsdam ultimatum had been clearer, Japan sooner.

2. Looking back, the world a way to end the war without two cities being destroyed.

3. Whatever one believes, such weapons on civilians.

1. …could have surrendered sooner. (an unrealised possibility)

2. …could have found / should have found a way… (possibility, or regret)

3. …should never have been used / needn't have been used on civilians. (criticism, or "unnecessary")

Notice: "could have" weighs what was possible; "should have / ought to have" passes judgement; "needn't have" says it happened but wasn't necessary.

Hold on to these forms — you'll need them in the Speak tab, where you'll weigh a hard decision and say, carefully, what could, should, or needn't have been done.

Hear it for real

You've read the story and you have the words — so now the real thing is within reach. There's a full podcast episode that tells this story in much greater depth, in natural, real-speed English. It's optional: the lesson stands on its own without it.

🎧 Heard it already? Then treat everything so far as your recap — and listen out below for the extra detail the episode adds. Haven't? You've lost nothing: you now know the story and the key vocabulary, which is exactly what makes a fast native podcast suddenly followable. Listen before next time.

Short History Of… The Hiroshima and Nagasaki Bombings

From the Noiser podcast network. Hosted by historians, roughly 50 minutes. It plays in the page on the Noiser site, or search "Short History Of Hiroshima and Nagasaki" on Spotify.

Play on Noiser →

Prefer Spotify? Open the show and find the Hiroshima and Nagasaki episode.

Listen out for — and bring back to talk about

As you listen (now or for homework):
  • The episode goes deeper into the decision itself — the warnings, the debates among the leaders. What does it add about why this path was chosen over the alternatives?
  • Find one detail or one personal account the episode adds that this lesson didn't tell you — a person, a moment, a number — and be ready to explain it in your own words.
  • Listen for two or three of today's key words used naturally by the historians (capitulate, non-combatants, radiation, casualties, the aftermath…). How did they use them?

Speak

This is the heart of the lesson — do all of it out loud. It's a serious subject, so speak with care; the timer is there to keep you going, not to rush you.

Useful language: reach for the modal perfects to weigh the past — could have for what was possible ("the war could have ended differently"), should have / ought to have for judgement ("more time should have been given"), needn't have for what was done but unnecessary ("the second bomb needn't have been dropped"). For careful opinions: "It's hard to say, but…", "One could argue that…", "On one hand… on the other…", "With hindsight, perhaps…".
Time remaining: 4:00
Task A · Tell the whole story (4 minutes)

Tell the story in your own words, as if to someone who knows only the bare outline. Move through the arc: the secret race to build the weapon → the Potsdam ultimatum → Hiroshima on 6 August → Nagasaki on 9 August → Japan's surrender → the long aftermath and the survivors.

Keep the tone serious and respectful, and work in at least five key words (atomic bomb, ultimatum, detonate, capitulate, non-combatants, devastation, obliterate, casualties, radiation, aftermath).

Task B · Weigh the great debate (4 minutes)

Set out, as fairly as you can, both sides of the question: was the use of the bombs justified? Give the strongest version of each argument before you say what you think — and use the modal perfects to judge carefully ("the war could have ended another way", "more time should have been given", "the second bomb needn't have been dropped"). Aim to be fair before you are decided.

Task C · A hard decision, looked at again (4 minutes)

Tell of a difficult decision — a moment when there was no clearly "right" choice — and look back on it with the grammar of this lesson. Use could have, should have and needn't have to weigh what was done.

Stuck for an idea? Pick one of these and run with it:

  • A leader's decision in history that people still argue about — and what, you'd say, should or needn't have been done.
  • A turning point in your own country's past that could have gone another way.
  • A choice in your own life that you look back on — what you could have, should have, or needn't have done.
  • A famous "what if": a moment where one different decision might have changed everything.
  • A rule or a warning that, with hindsight, ought to have been listened to.
  • A time the world chose, or failed to choose, peace over force — and what it could have done differently.

To finish — the bigger questions

  1. When, if ever, can the deliberate harming of civilians be justified in war? Make your reasoning explicit.
  2. Does it matter, morally, whether the second bomb "needn't have been dropped" — or is one bomb already too many? Explain.
  3. Memorials exist so the world will remember. Can remembering a horror actually help prevent it — or do we forget anyway?
  4. Before you go — from memory: say one sentence with could have, one with should have, and one with needn't have about this story, and explain why each form fits its meaning.