Articles on Nuclear proliferation

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United Nations Security Council members listen to Iranian Deputy Ambassador to the United Nations Eshagh Al-Habib, left, during a meeting on Iran’s compliance with the 2015 nuclear agreement, Dec. 12, 2018, at UN headquarters. AP Photo/Mary Altaffer

Nuclear weapons and Iran’s uranium enrichment program: 4 questions answered

Iran's leaders are threatening to breach a 2015 agreement that froze their country's nuclear program. What is uranium enrichment, and what would it mean for Iran's ability to build nuclear weapons?
Pedestrians in Tokyo pass a television screen broadcasting a report on May 4, 2019 that North Korea has fired several unidentified short-range projectiles into the sea off its eastern coast. AP Photo/Koji Sasahara

What geology reveals about North Korea’s nuclear weapons – and what it obscures

North Korea is a major military threat to the US and its Asian allies, but exactly how powerful are its nuclear weapons? An earth scientist explains why it's hard to answer this question.
Kim Jong Un guides the test-fire of Pukguksong-2 in an undated photo released on Feb. 13, 2017. Reuters/KCNA

Will North Korea sell its nuclear technology?

Kim Jong Un's regime has already earned millions from the export of arms, missiles, drugs and endangered wildlife products.
Trucks cross the friendship bridge connecting China and North Korea on Sept. 4, 2017. Trump has threatened to cut off trade with countries that deal with North Korea. AP Photo/Helene Franchineau

Why UN sanctions against North Korea’s missile program failed

The international community has been trying to stop North Korea from developing long-range missiles for decades. So what went wrong?
Trump’s access to nuclear weapons poses a new and unknown threat to global peace and security. AAP Image/NEWZULU/ZACH SIMEONE

Three good reasons to worry about Trump having the nuclear codes

Donald Trump will soon have command of thousands of nuclear weapons. This presents a new and unknown threat to global security - and an urgent incentive for all states to ban nuclear weapons.
On August 6, 1945, a crude bomb containing 60 kilograms of highly enriched uranium exploded 580 metres above Hiroshima. EPA/Hiroshima Peace Memorial Museum

Ban the bomb: 70 years on, the nuclear threat looms as large as ever

Today's nuclear arsenals are so powerful that dropping a Hiroshima-size bomb every two hours for 70 years would not exhaust their destructive capacity. The global disarmament regime is broken.

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