Grace McKinnon on X: "One TikTok user claims the identical looped sound heard across all videos stems from a 10 minute 'Nuclear Alarm Siren…Russian invasion of Ukraine 2022'. The clip YouTube clip,
Nuclear Alarm Sound Button - Apps on Google Play
Cold War warning sirens are sounding across France. Here's why | CNN
nuclear alarm by Izaka440
Mass public warning systems - Electronic outdoor sirens and early warning and emergency notification systems
Hawaii to resume Cold War-era nuclear siren tests amid North Korea threat - The Japan Times