• DOOMSDAYDoomsday Clock Set at 90 Seconds to Midnight

    The Doomsday Clock was set at 90 seconds to midnight, due largely but not exclusively to Russia’s invasion of Ukraine and the increased risk of nuclear escalation. The new Clock time was also influenced by continuing threats posed by the climate crisis and the breakdown of global norms and institutions needed to mitigate risks associated with advancing technologies and biological threats.

  • NORTH KOREAExperts: North Korea's ICBMs Pose Preemption Challenges for US

    By Christy Lee

    North Korea’s rapidly advancing ICBM capabilities pose a growing threat to the United States and its allies, especially as it will become increasingly difficult to destroy Pyongyang’s missiles prior to launch with preemptive strikes.

  • NORTH KOREAAccepting Reality: For the Foreseeable Future, Denuclearizing North Korea May Be Unattainable

    For two decades now, U.S. policymakers have sought North Korean denuclearization. In the early 2000s, it appeared to be a necessary goal, because a nuclear North Korea would threaten U.S. allies, spread nuclear weapons beyond the Korean Peninsula, damage the sanctity of the nuclear taboo, and eventually threaten U.S. territory. But the enemy gets a vote, and it is now clear that for the foreseeable future, there is nothing the United States can do, short of a direct military attack, to eliminate North Korea’s nuclear weapons.

  • NORTH KOREANorth Korea’s Nuclear Program Is Funded by Stolen Cryptocurrency. Could It Collapse Now That FTX Has?

    By James Jin Kang

    Kim Jong-un’s military operation hackers have been stealing cryptocurrency to support North Korea’s nuclear and missile program for several years. But with the general downturn in the crypto market, coupled with the recent FTX collapse and myriad other pitfalls, analysts estimate North Korea has probably lost most of its crypto haul. Can we expect its nuclear weapons development to come to a halt, or slow down? It seems unlikely.

  • IRAN’S NUKESIran Building Nuclear Weapons

    By David Albright

    Rather than a traditional nuclear weapons program, Iran threatens the world with a program ready to produce nuclear weapons “on-demand.” Its readiness program poses a difficult challenge to the international community and the International Atomic Energy Agency (IAEA). Understanding the pace of Iran building nuclear weapons matters, in particular, for designing strategies against Iran moving to construct them.

  • IRAN’S NUKESIran Needs Only 4 Weeks to Produce Enough Material for 4 Nuclear Weapons

    Due to the current size of Iran’s 60 percent, 20 percent, and 4.5 percent enriched uranium stocks, Iran can now produce enough weapon grade uranium for four nuclear weapons in one month and make enough for a fifth weapon within the following month.

  • NUCLEAR WEAPONSWhat Would Happen If a Nuclear Bomb Was Used in Ukraine?

    By Clare Roth

    Atomic bombs dropped on Hiroshima and Nagasaki, and meltdowns at the Chernobyl and Fukushima power plants clearly affected people’s health. But experts say it’s hard to predict the fallout from a nuclear war today.

  • NUCLEAR WEAPONSInvestigating Stockpile Stewardship Applications for World’s Largest Computer Chip

    By Neal Singer

    The Cerebras Wafer-Scale Engine is the largest computer chip in the world, containing 2.6 trillion transistors, 850,000 artificial intelligence cores. Researchers at Sandia and Los Alamos are accelerating advanced simulation and computing applications in support of the nation’s nuclear weapons stockpile stewardship mission.

  • NUCLEAR WEAPONSNuclear Weapons Use Will ‘End’ Kim Regime, US, South Korea Say

    By Carla Babb

    The United States and South Korean defense leaders are warning Pyongyang that any use of nuclear weapons by North Korean leader Kim Jong Un would be the “end” of his regime.

  • NUCLEAR WEAPONSPakistan Protests Biden Questioning of Safety of Pakistan’s Nuclear Weapons

    By Ayaz Gul

    Pakistan has formally protested to the United States over remarks by President Joe Biden questioning the safety of Islamabad’s nuclear weapons. Biden told a Democratic Congressional fundraiser Thursday night that Pakistan “may be one of the most dangerous nations in the world” for possessing “nuclear weapons without any cohesion.”

  • NUCLEAR WEAPONSWhy the U.S. Nuclear Umbrella Underpins Non-Proliferation

    By Alex Bristow

    Early in the Cold War, forward-deployed nuclear weapons were focused on deterrence and warfighting, compensating for the numerical superiority of communist armies. As Soviet capabilities improved and more countries became nuclear powers, the purpose of the U.S. nuclear umbrella expanded to include non-proliferation. In essence, the U.S. preferred to protect key allies like Japan rather than risk them developing their own arsenals.

  • NUCLEAR WEAPONSRumors Grow of Russia's Nuclear Weapons Moves

    European news outlets have been reporting that in the past twenty-four hours the Russian military has been moving components related to a nuclear weapon launch closer to the Russia-Ukraine border. NATO intelligence officials have said that a Russian submarine carrying nuclear-armed underwater drones has “disappeared” from its port in north Russia.

  • NUCLEAR WARNuclear War: Does It Take Luck or Reasoning to Avoid It? Lessons from the Cuban Missile Crisis, 60 Years On

    Sixty years ago, at the height of the Cuban Missile Crisis, President John Kennedy told his cabinet that he estimated the odds of an all-out nuclear war with the Soviet Union to be “somewhere between one in three and even.” How close we are to a nuclear war with Russia today? It is hard to tell. Deliberate escalation may be unlikely, and we may avoid the worst-case scenario. However, there are many situations that could unintentionally lead to disaster.

  • NUCLEAR WEAPONSU.S. Nuclear Testing Moratorium Launched a Supercomputing Revolution

    By Bob Webster and Nancy Joe Nicholas

    On 23 September 1992 the U.S. conducted its 1,054th – and last — nuclear weapons test. After the test, and with the Soviet Union gone, the U.S. government issued what was meant to be a short-term moratorium on testing, but the moratorium has lasted to this day. This moratorium came with an unexpected benefit: no longer testing nuclear weapons ushered in a revolution in high-performance computing.

  • NUCLEAR WEAPONSScientific Discovery for Stockpile Stewardship

    Following the U.S. last nuclear test in September 1992, the Department of Energy’s national labs convened to develop a strategy and map out an R&D effort that would come to be known as the Stockpile Stewardship Program (SSP). Its mission was ensuring the readiness of the nation’s nuclear deterrent force without nuclear tests.