Japan is on the verge of classifying a toxic water leak at its crippled Fukushima nuclear plant - a level three "serious" incident.
That would be the highest warning since the massive meltdown following an earthquake and tsunami back in 2011.
Japan to issue gravest warning since quake on Fukushima nuclear plant leaks
Our Kyung Lah was the first American broadcaster to report from inside the Fukushima plant shortly after the disaster.
OutFront: Kyung Lah has the latest.
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