Twenty-five years since the communist regime in Vietnam defeated the American-backed South, three million Vietnamese civilians and soldiers long dead, the legacy of the deadly defoliant Agent Orange lives on.

In his book No More Vietnams, Richard Nixon claims that 'No event in American history is more misunderstood than the Vietnam War ... rarely have so many people been so wrong about so much.'

What is understood is that during the war, the United States sprayed nearly 20 million gallons of herbicides into the hardwood forests of Vietnam, including 11.2 million gallons of tetrachlorodibenzo-para-dioxin, otherwise known as Agent Orange.