Agent Orange was an herbicide and defoliant used by the U.S. Department of Defense in southeast Asia between 1961 and 1971, primarily over South Vietnam and to a lesser extent Laos, Cambodia and North Vietnam. The chemical was also sprayed along the DMZ in South Korea between 1968 and 1969.
The herbicides mixture contained dioxin, a known carcinogen and contributor to birth defects, as well as chlorine that is known to cause skin irritation and rashes. Over 30 types of cancer have been linked to Agent Orange exposure including lung and prostate, leukemia, Hodgkins disease and Non-Hodgkin lymphoma. Spina bifida is the birth defect most commonly associated with children conceived after a parent's exposure.