Repairing the damage caused by Agent Orange
24 July 2013 Last updated at 23:36 BST
Four decades after the end of the Vietnam War, it is believed three million people inside the country are suffering from the effects of Agent Orange, a herbicide used by the American military to uncover places the enemy could hide.
Now the US is helping to pay for a solution that would clean up the soil that still contains the toxic compound.
The BBC's Karishma Vaswani reports from Danang.