N Korea vows 'merciless blow with nuclear hammer' against US
North Korea has vowed to "strike a merciless blow at the heart of the US" with its "powerful nuclear hammer" if the US attempts to overthrow its leader Kim Jong-un. This comes after CIA Director Mike Pompeo claimed that North Koreans would love to see Jong-un's removal, and called Jong-un "the thing that is the most dangerous" about North Korea. 