Extreme US weather: what is a 'bomb cyclone'?

With the east coast of the United States currently experiencing an unprecedented cold snap, forecasters have warned that a "bomb cyclone", an extreme winter storm, could be on the way. Video: David Dunne

Associated article


Lü Lingshun

Lü Lingshun on the gaokao, China's university admission exam. Video: Nicolas Schmitt / The Irish Times


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