His report states: It appears that a number of agents or a combination thereof have been employed. one being generally known as "Yellow Rain." Most of the features described with "Yellow Rain" are consistent with trichothecene mycotoxicosis. Mr. President. suffice it to say the technical evidence is there for those who still have doubts. I know there are many naysayers. But. if they look at all the evidence. which includes the scientific analysis. sanitized intelligence. refugee reports. the reports from doctors. refugee workers. and journalists. I find it hard to believe they can still be doubters. Now the question arises as to where these chemical and toxin weapons come from as neither Vietnam.