Worries and hopes regarding the dangers of radiation in Japan

Hiroshima survivors fear new nuclear fallout

The cities flattened by last week's earthquake look eerily similar to the decimated buildings Shigeko Sasamori saw after an atomic bomb was dropped on her hometown in 1945.

The floodwaters from the tsunami -- the waves of debris and bodies -- remind her of the rivers in Hiroshima, Japan, swamped with corpses.

And the struggle to contain radioactive emissions at the Fukushima Daiichi nuclear plant makes Sasamori, 78, wonder if the crisis there will plague a new generation in Japan.

"Radiation is the most horrible thing, and it's more horrible to me because humans make it," she said from her home near Los Angeles. "We don't have to make that."

Sasamori is a hibakusha, or heat radiation survivor -- a name given to those who lived through the atomic bombs dropped on Hiroshima and Nagasaki by the United States at the end of World War II.

For them, radiation is an invisible enemy that has haunted them, claimed their loved ones, altered their bodies and threatened their lives.