is forcing residents to evacuate. officials are trying to clear out everyone within a one-mile radius of a fertilizer plant, warning for the potential of an ammonium nitrate come pound. the same thing happened in texas when a plan grew up. it is also used in improvised explosives such as in the oklahoma city bombing. diane joins us. what are the authorities saying about the risk of this exploding? >> the risk remains high. to show how precarious it is, there was three time the amount of ammonium nitrate in this plant in north carolina than there was. in west texas plant that exploded which is why the fire chief says they have gone ahead and tried to continue convincing anybody within a one-mile radius to evacuate their homes. they went door to door overnight