N Korea warns US of 'immediate & strong ​response' over arms sale to S Korea

North Korea condemned US approval of an air-to-air missile sale to South Korea and warned of "immediate and powerful ​response". Calling it "a new threat" to its security, it said, "We...recognised the expression of the US open attitude to be always hostile to [us]". This comes as US President Donald Trump pushes for a summit with North Korea's Kim Jong-un.