One of the films I watched back in California, and was very touched by, is one made by a Japanese visiting scholar, Masako Sakata, on the devestating effect of Agent Orange, used widely by the US forces in Vietnam during the war.
In the case of Masako, the film was literally a personal requiem as the tragedy was to touch her personally, with the passing away of her husband, a US Vitenam war veteran-turned-photographer and anti-war activist.