The US has begun a project to help clean up Agent Orange contamination at one area in Vietnam - the first such move since the war ended in 1975. The work is taking place at the airport in the central city of Danang.
The US sprayed millions of gallons of the toxic defoliant over jungle areas to destroy enemy cover. Vietnam says several million people have been affected by Agent Orange, including 150,000 children born with severe birth defects.