mosque where he did worship on however many occasions, what is the fbi saying about that? >> reporter: well, they are saying that it looks like arson and they are not saying it was definitely retribution for what happened but it looks like that. they are certainly investigating. they put out a $10,000 reward for any information. they say this is leaders of the mosque came out and strongly condemned the plot that mohamed osman mohamud allegedly hatched. they said that condemnation took place just hours before the fire was set early sunday morning. jon: dan springer reporting live. thanks. patti ann: both north and south korea are now ramping up the angry rhetoric. will the crisis on the korean peninsula spiral out of control? and waving can be done to keep that from happening? we'll ask jim walsh coming right up.