The authoritative guide to ensuring science and technology make life on Earth better, not worse.

security assurances

NPT Review Conference: Will it rise to the proliferation challenges?

By François Diaz-Maurin | Nuclear Weapons

US President Bill Clinton, Russian President Boris, Yeltsin, and Ukrainian President Leonid Kravchuk sign the Trilateral Agreement on transferring nuclear weapons from Ukraine to Russia and associated matters in Moscow, January 1994. Photo credit: Joseph P. Harahan, historian of the Defense Threat Reduction Agency, and the Clinton Presidential Library.

Why security assurances are losing their clout as a nuclear nonproliferation instrument

By Ariel E. Levite | Nuclear Weapons

Watch the 2025 Doomsday Clock announcement on January 28