A television grab from North Korea's state television channel shows North Korean leader Kim Jong-un inspecting a 'nuclear' warhead near Pyongyang, North Korea on September 3, 2017. North Korea carried out its most powerful nuclear test to date yesterday, claiming to have developed an advanced hydrogen bomb that could sit atop an intercontinental ballistic missile. Photo by Stephen Shaver/UPI

September 6, 2017   < 1