Articles on Nuclear weapons

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US and Iran have a long, troubled history

Some of the major events in US-Iran relations highlight the differences between the nations' views, but others presented real opportunities for reconciliation.
Digital attacks can cause havoc in different places all at the same time. Pushish Images/Shutterstock.com

A cyberattack could wreak destruction comparable to a nuclear weapon

Nuclear threats are serious – but officials, the media and the public keep a close eye on them. There's less attention to the dangers of cyberattacks, which could cripple key utilities.
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.

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