Pressure rising in one reactor at troubled nuclear plant

Tokyo (CNN) -- Even as workers began to see some success in their battle to cool down reactors at the Fukushima Daiichi nuclear plant, Japanese officials said Sunday that they would have to release some radioactive gas into the air.

The country's nuclear safety agency said releasing the gas was a necessary step to reduce mounting pressure in reactor No. 3's containment vessel -- the steel and concrete shell that insulates radioactive material inside.

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Libyan ruler defiant as airstrikes by coalition forces enter 2nd day

Tripoli, Libya (CNN) -- Fighter jets zoomed across eastern Libya on Sunday as an international military coalition hammered air defense positions near the capital for a second day.

Some Libyans welcomed the American, French and British military forces carrying out air and missile attacks in the first phase of an operation to enforce a no-fly zone.

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