Nuclear Fail-Safe, and Space Security and Stability—Explained

NTI joined world leaders and policymakers at the 2026 Munich Security Conference to issue two new statements on reducing nuclear risks on earth and in space, and to host a side event on managing those risks in today’s global void of nuclear uncertainty.

Big thing at Munich: Two statements by the Euro-Atlantic Security Leadership Group (EASLG) during the Munich Security Conference, “Support for Space Security and Stability,” and “Support for Preventing the Accidental, Mistaken, or Unauthorized Use of a Nuclear Weapon: Nuclear ‘Fail-Safe.’”

Former officials, military leaders, and experts from Europe and the Asia-Pacific underline that “Every nation with nuclear arms bears responsibility for reducing the risk of unintended, mistaken, or unauthorized nuclear use,” and that “Without practical steps to prevent conflict in space, the danger of nuclear catastrophe—by design or by blunder—grows significantly.”

The big picture:  New START, the last remaining arms control treaty numerically limiting U.S. and Russian nuclear forces, expired on February 5th. The erosion of arms control, disruptive new technologies, and heightened geopolitical tensions—including allegations of plans to place nuclear weapons in space—increases the danger that a nuclear weapon will be used.

Why it matters: Strengthening nuclear fail-safe measures and applying and adapting principles governing the use of outer space for peaceful purposes are essential to preventing nuclear use and maintaining strategic stability.

All for nuclear fail-safe: Seventy-five signatories representing 21 countries from the Euro-Atlantic and Asia-Pacific regions agree that all nuclear-armed countries must strengthen safeguards to prevent unauthorized, inadvertent, or mistaken use of a nuclear weapon. The signatories call on China, France, Russia, the United Kingdom, and the United States (the five nuclear-weapons states under the Nuclear Non-Proliferation Treaty (NPT)) to make a Joint Statement in support of nuclear fail-safe during the upcoming NPT Review Conference in April-May 2026.

Space, the essential frontier: Fifty-two signatories representing 14 countries call on leaders of nuclear-armed nations and other states parties to the Outer Space Treaty to apply and adapt seven historic principles governing the use of outer space for peaceful purposes, and support an inclusive dialogue on space security and stability to reduce the risks of conflict in space.

Connecting the dots: Nuclear weapons in space would increase the risk of unintended, mistaken, or unauthorized nuclear use and put increasing pressure on nuclear fail-safe measures designed to reduce nuclear risks.

Zoom in: The incorporation of artificial intelligence into attack warning systems, threat assessments, and decision-making processes could exacerbate the risk of nuclear use. Additionally, adversaries, including non-state actors, now possess the capability to launch cyberattacks that could disrupt nuclear command and control and early-warning systems.

Zoom out: Now with more than 10,000 active satellites from more than 100 nations and multi-lateral organizations in orbit, including for critical defense and national security interests, safeguarding the space environment has become one of the principal challenges of the 21st century.

The bottom line: On earth and in space, the world cannot afford to wait for more peaceful times to reduce the risks of nuclear use.