Hi, Earl, there are some of us who believe that the exposure to Agent Orange et al, the 15+ herbicides that come under that umbrella including Agent Blue which is high in arsenic content contributed to BC. My own husband was in Vietnam from late January 1968-Sept 1969. He was also in Korea in the early 1960s. As far as BC and VA goes they are approving some claims with proper info attached and usually on appeals. They apparently do not wish to open this Pandora's Box as there are a large number of civilians who unwittingly were exposed as well. I am sure the financial impact could be very great. So, there are some of us who are working on a sort of template (info that connects the BC to the AO et al exposure). Hope this helps. If you have heard nothing on your claim in 3 months I would consider contacting either your Veterans Service Officer or if they aren't able to assist you check online at ebenefits there is a place where you can track your claim.
www.va.gov Wishing you the best on this claim!