On June 12, Anthropic announced that the United States government issued the company a directive to suspend access to its latest large language models (LLMs) Mythos 5 and Fable 5 for any foreign ...

To navigate the new nuclear age, US policymakers must revisit the foundational 1960s logic that prioritized strict ...

A major industry safety report from 2026 found that several frontier AI labs have recently added restrictions to their systems since they could not rule out that their models might assist novices in ...

With the demise of New START creating a dangerous legal vacuum, Washington and Moscow must abandon outdated Cold War assumptions and forge a modern, shared definition of strategic stability.

Security Studies Program at MIT’s Center for Nuclear Security Policy (CNSP).

Sharon Squassoni is a research professor at the Institute for International Science and Technology Policy, Elliott School of International Affairs, at the George Washington University. She has ...

Scott Sagan is the Caroline S.G. Munro Professor of Political Science, the Mimi and Peter Haas University Fellow in Undergraduate Education, Co-Director and Senior Fellow at the Center for ...

September magazine: How to cut defense spending in a pandemic and climate change era. By The Bulletin | Climate Change, Disruptive Technologies, Nuclear Risk ...

Rachel Bronson is a senior advisor at the Bulletin of the Atomic Scientists. From February 2015 to January 2025, she served as the Bulletin’s president and CEO where she oversaw the organization’s ...

The mystique of nuclear-powered submarines has been captured by at least half a dozen popular Hollywood films. Some have centered on the drama of undersea warfare and the risk of global nuclear ...

Record-breaking climate trends continued in 2024 and 2025. Globally averaged temperature in 2024 was at the warmest level in 175 years of record-keeping. Likewise, atmospheric carbon dioxide—the ...