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Thunderbolt (siren) - Wikipedia
Coronavirus: On-edge Londoners unnerved as 'air raid sirens' now sound off in capital | The Independent | The Independent
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Cold War warning sirens are sounding across France. Here's why | CNN
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The haunting history of the air-raid siren | National Geographic
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Ghostly Swansea 'air raid siren' goes off in city bombed by the Nazis 75 years ago | Daily Mail Online
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Historic England: Air raid siren and mill among 2022 listings - BBC News
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Activists sound 'air raid siren' to warn of the climate emergency - YouTube
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Ukraine: Air raid siren blares out across capital Kyiv early this morning following Russia invasion | World News | Sky News
Residents in Huddersfield and Bradford say they heard an air siren - but no one knows what it was - YorkshireLive
The haunting history of the air-raid siren | National Geographic
Activists sound 'air raid siren' to warn of climate emergency | STV News
Primary History KS2: WW2 Clips. An air-raid siren sounds the warning - BBC Teach
