"Despite investigations by four special committees, key questions remain about the crisis at the Fukushima No. 1 nuclear power plant, the world's worst nuclear disaster since Chernobyl."

"COLUMBIA, Mo. -- A Missouri environmental group is asking the federal government to more closely scrutinize Ameren Corp.'s request for a 20-year license renewal at the state's only nuclear power plant.

"Twenty percent of U.S. EPA's radiation monitors were out of service last year when an earthquake caused a meltdown at Japan's Fukushima Daiichi nuclear power plant, according to a new report that confirms some of the claims of environmental watchdogs."

"With a manila envelope labeled 'TOP SECRET' propped up in front of him, state Rep. Lon Burnam, a Fort Worth Democrat, called on the Texas Attorney General to allow the public release of confidential information related to a West Texas radioactive waste dump owned by Dallas billionaire Harold Simmons."

"HOBSON, Texas -- At the back of a South Texas uranium processing facility, a few dozen black container drums stood outside, waiting to be shipped. Each was filled with about $50,000 worth of yellowcake, a powdery substance created from raw uranium."

"'The failure of the U.S. nuclear power program ranks as the largest managerial disaster in business history, a disaster on a monumental scale.' The rant of an antinuclear activist? Hardly. It was the first sentence of an in-depth story in a conservative business magazine, Forbes.  In 1985."

"BLAIR, Neb. -- Federal regulators said Wednesday it's unlikely the Fort Calhoun nuclear power plant will restart before fall because of the extensive inspections and repairs needed."

Cattle grazed on land containing abandoned uranium mines in the West are being sold for food. What hazards, if any, this may present to people consuming the beef are unknown.

"TOKYO — The damage to one of three stricken reactors at the Fukushima Daiichi plant could be worse than previously thought, a recent internal investigation has shown, raising new concerns over the plant’s stability and complicating the post-disaster cleanup."

"Kelp off Southern California was contaminated with short-lived radioisotopes a month after Japan’s Fukushima accident, a sign that the spilled radiation reached the state's coastline, according to a new scientific study."

"Concern over the safety of the San Onofre nuclear power plant is growing among Orange County cities closest to the facility, which has been shut down since January because of system failures."

"The Nuclear Regulatory Commission lays out steps that Southern California Edison must take before the troubled San Onofre plant will be allowed to come back on line."

"TOKYO -- One of Japan’s crippled nuclear reactors still has fatally high radiation levels and hardly any water to cool it, according to an internal examination Tuesday that renews doubts about the plant’s stability."

"World leaders may pledge tighter controls over nuclear materials to keep them out of the hands of terrorists, according to the draft of a communique to be released at the end of their two-day meeting in Seoul."

"BRATTLEBORO, Vt. -- A 93-year-old anti-nuclear activist was among more than 130 protesters arrested at the corporate headquarters of the Vermont Yankee nuclear power plant Thursday, the first day of the plant's operation after the expiration of its 40-year license."