Japan Nuclear Crisis: Rising Radiation Levels Halt Fukushima Plant Workers

"We're very close now to the point of no return," Dr. Michio Kaku, a theoretical physicist, said. "It's gotten worse. We're talking about workers coming into the reactor perhaps as a suicide mission and we may have to abandon ship." A group of 180 workers rotate shifts working at the plant in teams of 50 men. The men have been nicknamed the "Fukushima Fifty."