On March 11th, 2011, a magnitude 9.1 earthquake struck off the east coast of Japan.

It was the strongest quake ever recorded in Japan.

A massive tsunami followed.

This is from our camera reporter in Miyagi, and it looks like the tsunami has engulfed

several cities.

The solid wall of water peaked at almost 130 feet high.

Nearly 20,000 people died.

The giant wave crashed into a 1,200-mile stretch of Japan's coastline, including the east

coast of Honshu Island.

There, the Fukushima Daiichi nuclear power station took a direct hit.

The tsunami wiped out the plant's emergency generators.

Cool rods are now exposed, and if they stay that way, they could release radioactivity

and a disaster of unknown proportions.

Though on the coastline of an earthquake-prone country, Fukushima's emergency power supplies

were not in watertight containers.

Soon, the plant's operators could not pump water to cool the reactor.

The plant's reactors went into meltdown.

Within three days, all three cores were almost completely melted.

An uncontrolled release of dangerous radioactive pollution into the air forced 164,000 people

to evacuate their homes.

Fukushima was the worst nuclear disaster since Chernobyl.

Twelve years later, though, Fukushima's story is not yet over.

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