Well they seem to have a few studies into veterans health and whether it has been affected by agents known to have been used. These seem at first glance to be pretty well designed sudies and not at all slanted (the one I read came back negative for increased cancer risk after exposure to a certain chemical). The fact that they are conducting research rather than selectively summarising other work in a slanted way seem to make me thing they are a good possible source of info, rather than propaganda.