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In Japan, emergency workers have pumped nitrogen into the crippled Fukushima Daiichi nuclear reactor. It's an attempt to prevent an explosive build-up of hydrogen gas.
A plant operator official says it was a precautionary measure and there was only an "extremely small" chance of a repeat explosion. In the days after the March 11 earthquake, hydrogen explosions had damaged the plant.
Meanwhile, in towns around the Fukushima prefecture, environmental group Greenpeace measured radiation levels.
Levels of radioactive iodine and cesium in spinach leaves were considerably higher than the government limits.
Residents in Minamisoma City, located within the 19 mile nuclear exclusion zone, are running out of supplies.
Japanese officials said Thursday they were considering expanding the 12-mile evacuation zone around the plant.