In response to recent sanctions, North Korea threatened to cause the United States 'the greatest pain and suffering it has gone through in its entire history.' It's not something to be taken lightly - they do have nuclear weapons and an unpredictable dictator running things. Jimmy likes to be prepared in situations like this and we hear a lot about what to do in an earthquake but not much about how to deal with a nuclear attack. So we got in touch with Dr. Irwin Redlener who is the director of the National Center for Disaster Preparedness at Columbia University. Jimmy brought Guillermo along to meet him so they can be prepared when disaster strikes.