After the crisis in Japan, some experts have warned that stored fuel could pose a large danger in terrorists attacks.
The long term impact of the Fukushima crisis is unclear, but here are some early indicators.
U.S. officials also warn that the situation may be worse than official reports suggest.
What looks like an ominous cloud actually poses little serious health risks for the US.
If workers are forced to abandon a troubled nuclear plant in Japan, a complete meltdown is possible.
The reactor design at the Japanese plant has long been superseded because of safety failings.
Pools storing spent fuel are overheating, posing the threat of increased radiation leaks.
Nothing can stop radioactive decay--that's why it's so useful in spacecraft batteries yet so troublesome in shut-down nuclear reactors.
Engineers struggle to keep reactors cool after explosions and radiation leaks.
As oil prices surge, funding for energy research is more important than ever.