There's been another setback in the struggle to get Japan's nuclear reactors under control. Workers pulled back from the No. 2 reactor when radiation in the water there was measured at more than 1,000 millisieverts an hour, the highest level detected since the earthquake and tsunami on March 11, and according to the U.S. Environmental Protection Agency, enough to cause hemorrhaging with a single dose. Several days ago, three workers were injured when they came into contact with radioactive water in the No. 3 reactor. Officials are unsure where the water is coming from. The radiation seems to be contained in the plant, however, and radiation levels outside the plant have returned to normal.