When a nuclear bomb strikes, it sets off a flash of light, a giant orange fireball, and building-toppling shockwaves. 'It's very, very dependent on weapon size, what the topography looks like, where they detonate it, who's upwind, who's downwind.' 'It's really hard to say, 'Well, this city will survive and that city won't,'' she added. 'I hope it doesn't escalate, and I think there's a good chance that it doesn't, but the risk is real whenever nuclear-armed states are engaged in conflict with one another,' Tara Drozdenko, the director of the Union of Concerned Scientists' Global Security Program, told Insider.

In a speech on Tuesday, President Joe Biden said the US had 'no intention of fighting Russia' but added: 'The United States and its allies will defend every inch of NATO territory.' The US belongs to NATO, a military alliance consisting mostly of European countries, but Ukraine does not.Ī nuclear strike is unlikely but not altogether implausible, experts told Insider. Security experts hope the conflict won't broaden to include other countries or devolve into a full-fledged world war. At least 25 civilians have been killed in the fighting, according to the latest count from the United Nations High Commissioner for Human Rights. Russia has launched about 200 missiles since the start of the attack, a senior US defense official said at a Friday news briefing. Russian forces attacked Ukraine with missile strikes and shelling on Thursday, kicking off a dramatic escalation of the conflict in the region.

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