[cnn-photo-caption image=http://i.cdn.turner.com/cnn/2011/WORLD/asiapcf/04/01/japan.nuclear.reactors/t1larg.evac.gi.afp.jpg caption="A group evacuated from Fukushima at a makeshift shelter in the city of Yokote, Akita prefectur ." width=300 height=169]
Tens of thousands of people evacuated from a 12-mile area around the crippled Fukushima Daiichi power plant may not be allowed home for months.
"The evacuation period is going to be longer than we wanted it to be," Chief Cabinet Secretary Yukio Edano said about the 78,000 people who lived closest to the plant.
Meanwhile, a second test shows no radioactive contamination of beef in Japan. Health officials announced Friday that earlier testing showing some contamination was wrong.
High radiation levels at the plant are still causing concern. Workers can't find the source.
Crews have sprayed more than 500 gallons of synthetic resin, a substance used to contain radioactive particles.
There’s also word that the world's largest cement pumps will be shipped to Japan aboard transport planes.
The giant trucks with powerful pumps and flexible arms can be used to fire cement to seal the site.
In 1986, the same equipment was used entomb Chernobyl's melted core reactor.
Tom Foreman will use our data wall to show you how the specialized trucks could be used in Japan.
We'll also talk with our reporters in Libya where opposition leaders revealed their conditions for a cease-fire.
Among their key demands: regime change in Libya, and the removal of snipers.
But the Libyan government isn't backing down.
"They are asking us to withdraw from our own cities, and open our cities to people who are holding up arms, who are tribal, violent, no unified leadership," Libyan government spokesman Musa Ibrahim said.
"If this is not mad, then I don't know what it is," he added.
We also have amazing video of a dog rescued from the roof of a house afloat in the sea in Japan three weeks after the quake and tsunami hit.
Join us for these stories and much more starting at 10 p.m. ET.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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