Radiation exposure: Adding to the monumental losses after a Japanese earthquake and tsunami, problems at four nuclear reactors have residents near and far concerned about radiation exposure.
Release of radioactivity from the nuclear-reactor equipment has been limited, so it does not constitute a dire threat to the US yet. But the meltdown situation could quickly change.
The Obama nuclear summit is focusing less on nuclear weapons and more on more poorly guarded nuclear materials that could be used to build nukes.
A secret nuclear site. ‘Project 110.’ Offers to ship fuel abroad. Part of Iran’s quest to be regional power?
Rolf Mowatt-Larssen, a former CIA counterterrorism expert, lays out his ideas on how to prevent the spread of nuclear materials on the black market – including the controversial 'Armageddon test.'