Stricken Japan nuclear plant rocked by 2nd blast

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ERIC TALMADGE, Associated Press

SHINO YUASA, Associated Press

SOMA, Japan - The second hydrogen explosion in three days rocked a Japanese nuclear plant Monday, devastating the structure housing one reactor and injuring 11 workers. Water levels dropped precipitously at another reactor, completely exposing the fuel rods and raising the threat of a meltdown.

The morning explosion in Unit 3 of the Fukushima Dai-ichi plant was felt 25 miles (40 kilometers) away, but the plant's operator said radiation levels at the reactor remained within legal limits.