"U.S. stocks fell Monday as investors struggled to assess the financial fallout of Japan’s earthquake and tsunami."

"Even as workers race to prevent the radioactive cores of the damaged nuclear reactors in Japan from melting down, concerns are growing that nearby pools holding spent fuel rods could pose an even greater danger."

"Japan’s nuclear crisis verged toward catastrophe after an explosion further damaged one of the crippled reactors and a fire at another spewed large amounts of radioactive material into the air."

"In the debates about the prospects for a U.S. nuclear power rebirth, there was one thing advocates, foes and regulators seemed to agree on: The industry could not afford another Three Mile Island accident."

The aging fleet of US nuclear power reactors have some technological similarities to the reactors failing in Japan. Could similar loss-of-cooling events happen at some US reactors — whether caused by earthquake, tsunami, terrorist attack, electrical outage, flooding, equipment failure, or some other problem?

"The Transportation Security Administration announced Friday that it would retest every full-body X-ray scanner that emits ionizing radiation — 247 machines at 38 airports — after maintenance records on some of the devices showed radiation levels 10 times higher than expected."

"The official announcement that two reactors at an earthquake-damaged nuclear plant could be suffering meltdowns underscores the Japanese nuclear industry’s troubled history, and years of grass-roots objections from a people uniquely sensitive to the ravages of nuclear destruction."

"A second explosion rocked a troubled nuclear power plant Monday, blowing the roof off a containment building but not harming the reactor, Japanese nuclear officials announced on public television. The explosion underscores the difficulties Japanese authorities are having in bringing several stricken reactors under control three days after a massive earthquake and a tsunami hit Japan’s northeast coast and shut down the electricity that runs the crucial cooling systems for reactors.

An explosion at a nuclear power plant in northern Japan on Saturday blew the roof off one building, brought down walls and caused a radiation leak of unspecified proportions, Japanese officials said, after Friday’s huge earthquake caused critical failures in the plant’s cooling system."

"The electromagnetic radiation emitted by a cellular phone's antenna appears to activate nearby regions of the brain to unusually high levels, according to a study published Tuesday in the Journal of the American Medical Assn. that is likely to spark new concerns about the health effects of wireless devices."