Here is North Korea...
They conducted a successful ICBM Test. And are very confident now:
http://kcna.kp/en/article/q/a382a3b0428270b9ad15ffdb5980696d.kcmsf
"He [Kim Jong Un] said that the resolute military activity conducted by the company this time true to the Party's battle order was a demonstration of loyalty and strong stand of the DPRK's armed forces defending the sovereignty of the country and a clear explanation of the offensive counteraction mode and the evolution of the nuclear strategy and doctrine of the DPRK not to hesitate even a nuclear attack when the enemy provoke it with nukes.
Saying that defending of the country's dignity, sovereignty and interests can be certainly guaranteed only by strong power, he added that it is the genuine defence capability and defence of durable peace to have the real capability for preemptively attacking the enemy anywhere and the war posture, making any enemy feel fear"
Let's see how the US will react..