Emails reveal panic at U.S. nuclear agency as experts were kept in the dark following Fukushima disaster
- One email reads: 'We have very little factual information as an agency'
- Nuclear Regulatory Commission inundated with requests over safety of U.S. nuclear facilities in wake of disaster
- Experts disagreed over best way to contain Fukushima disaster
- Worst-case scenario would have seen high levels of radiation reach Alaska