Twenty years ago, the adoption of the Amendment to the Convention on the Physical Protection of Nuclear Material (A/CPPNM) marked the start of a new era in international efforts to counter the risk of ...

For nearly a century, scientists around the world have been searching for dark matter—an invisible substance believed to make ...

The International Atomic Energy Agency (IAEA), the intergovernmental body that assesses compliance with the Nuclear Nonproliferation Treaty, was barred from going within about 40 miles of the affected ...