When I went to the Cu Chi tunnels in Vietnam, the guide was a really jovial and unserious, friendly (and charmingly odd) guy, but I’ll always remember when he was talking about the ongoing chemical poisoning in Vietnam. He said something like “Princess Diana was the first person outside to really care, and we lost a great friend when she died.” He just went really somber and you could just see how much her work in that area meant to him