Kim Jong Un promises to make a ‘mentally deranged’ Trump pay dearly for his threats
Israel refuses to confirm or deny it has such weapons or to sign up to nuclear Non-Proliferation Treaty
Environment ministry has ruled out possibility the test would have any radiation impact upon China
Pakistan is the only exception in the nuclear club which has not tested the thermonuclear device
North Korean state TV says, "With perfect success of historic H-bomb, we have joined rank of advanced nuclear...