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The world's top cyber powers
Rebecca Zisser / Axios

Cyber attacks have started causing disruption and confusion in day to day activities across the world, from the WannaCry attack this May, which hit hospitals and swept through hundreds of countries, to the 2015 hack that shut down Ukraine's power grid.

So what countries should we be most wary of in the cyber realm, and what kinds of attacks does each of these top hacking countries tend to launch?