The airports at Da Nang, Bien Hoa, and Phu Cat have been referred to as dioxin “hotspots” due to high dioxin concentrations remaining decades after large volumes of Agent Orange and other defoliants were handled at these sites. The Government of Vietnam (GVN) has requested assistance from the United States (U.S.) to remediate dioxin-contaminated soil and sediment at Da Nang, and from the United Nations Development Program (UNDP) at Bien Hoa.