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

Osama bin Laden

A scene from a Ventura County, California public service video on preparing for and responding to a nuclear terrorism event.

Twenty years after 9/11, terrorists could still go nuclear

By Matthew Bunn | Nuclear Risk, Nuclear Weapons

Pakistan’s nuclear forces, 2011

By Hans M. Kristensen, Robert S. Norris | Nuclear Notebook