The US government says North Korea is behind the WannaCry attacks. Security experts say there’s not enough evidence to definitively tie the government in North Korea to the attacks. They say most of the clues cited as evidence of North Korea’s involvement are circumstantial and can have other explanations. The attacks, which infected some 300,000 computers in 150 countries, have been attributed to North Korea. Microsoft has also said the information it has is not enough to conclusively attribute the attacks to a specific nation state.”]