It’s been two weeks since the earthquake and tsunami hit Northeastern Japan. Ever since that day, Japanese officials have been working tirelessly to avert a nuclear disaster. Friday morning, Japanese nuclear safety officials said that they suspect that the reactor core at one unit of the troubled Fukushima Daiichi nuclear power plant may have breached. That raises the possibility of more severe radioactive contamination to the environment. Henry Fountain, Science Reporter for The New York Times explains the latest.