Fukushima Crisis Worsens as U.S. Warns of a Large Radiation Release

The top U.S. nuclear regulator, Gregory Jaczko, gave a dire assessment of Japan’s nuclear crisis yesterday, saying that lethal radiation from uncovered spent fuel above one of the reactors could force emergency workers to abandon their fight to prevent meltdowns of damaged reactor cores at the Fukushima Daiichi plant

More here:
Fukushima Crisis Worsens as U.S. Warns of a Large Radiation Release