And then I was diagnosed some time ago with having that disease, [which it's now known was] caused by my time in Vietnam." "If we don't fight and stand up, and say this condition was caused by my time in Vietnam, if it's not written down somewhere, those great-great-grandchildren of mine cannot relate it back to anything, and they will be left out there in the cold." The New Zealand Aid programme currently dedicates $10 million for projects in Vietnam, so matching USAID's $50 million contribution for Agent Orange clean up is an unrealistic target. Mr Barnes himself says it makes sense for the U.S. to bear the brunt of responsibility. But a gesture from New Zealand towards the clean up would be a good move. Until then, it seems the veterans will continue their fight for greater security for themselves and their families. The New Zealand Defence Force and Veterans Affairs did not respond to a request for comment, except to say they were not involved in the manufacture of Agent Orange. Frances Cook is travelling with support from the Asia NZ Foundation. Follow her on Twitter @FrancesCook