Undated picture released by North Korea’s official Korean Central News Agency  shows North Korean leader Kim Jong-Un (centre) looking at a metal casing with two bulges at an undisclosed location. North Korea claims to have developed a hydrogen bomb which can be loaded into the country’s new intercontinental ballistic missile. Photograph: AFP

North Korea claimed that a nuclear blast on Sunday was a big advance from its previous five tests because it had successfully detonated a hydrogen bom(...)

Japan’s prime minister Shinzo Abe speaks to reporters after having a telephone call with US resident Donald Trump at the prime minister’s former official residence in Tokyo, Japan. Photograph: Kyodo/Reuters

Japanese prime minister Shinzo Abe on Sunday called North Korea’s sixth nuclear test “absolutely intolerable”, but there are conflicting signals from (...)

Sumiteru Taniguchi showing a photo of himself taken in 1945 after an atomic bomb attack on Nagasaki. File photograph: Eugene Hoshiko/AP

Sumiteru Taniguchi, who devoted his life to seeking to abolish nuclear weapons after he was severely burned in the 1945 atomic bomb attack on his home(...)

US chairman of the joint chiefs of staff Gen Joseph Dunford, and his Chinese counterpart, Gen Fang Fenghui, in Beijing. Gen Fang said both sides should “push forward stable military ties as an important and major stablising factor in bilateral relations”. Photograph:  Thomas Peter/Reuters

South Korea’s main opposition party and a former head of the US Navy in the region have separately called for the deployment of tactical nuclear missi(...)

US B52 drop bombs over a Viet Cong controlled area in South Vietnam in 1965. America lost 60,000 military in Vietnam. Nearly two million Vietnamese civilians were killed. File photograph: AFP/Getty Images

Do we think it’s a good omen or bad omen that America will be enveloped in darkness during a solar eclipse on August 21st? It can be tempting to give (...)

US president Donald Trump with  vice-president Mike Pence  after a briefing with his national security team at Trump National Golf Club in Bedminster, New Jersey, on Thursday. Photograph: Al Drago/New York Times

US president Donald Trump renewed his attack on North Korea last night, warning that the country should be “very, very nervous” if it does anything t(...)

A propaganda poster is displayed during a rally in support of North Korea’s stance against the US, on Kim Il-Sung square in Pyongyang on Wednesday. Photograph:   Kim Won-Jin/AFP/Getty Images

Actions speak louder than words. But in international diplomacy, not least in the delicate dialogue between nuclear adversaries, words are actions too(...)

Musician Junshi Morakami plays the Irish harp during the commemoration for the victims of the Hiroshima atomic bomb in Merrion Square Park, Dublin.  Photograph: Nick Bradshaw

A daughter of survivors of the Hiroshima attack has called for the Irish State to continue its “critical role” in advocating for nuclear disarmament a(...)

Mazda’s orange-and-green rotary-engined 787B. “These cars were 800bhp, 230mph projectiles, they were fantastic to drive and unbelievable to see, hurtling down the Mulsanne at 230mph.”

Felix Wankel was not a nice man. Oh, I’m sure he was nice to his wife and kids, and probably loved dogs or budgies or hamsters or some such. Maybe he (...)

Nagasaki: part of the ruined city after the dropping of the atomic bomb, in 1945. Photograph: Hulton/Getty

Overshadowed by the ongoing game of nuclear bluff and brinkmanship in east Asia, the United Nations is discussing a worldwide ban on nuclear weapons. (...)

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