Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Agent Orange Still a Major Concern for Vietnam Ha Nguyen HO CHI MINH CITY - Vietnam has handed over an area of land to its former war enemy the U.S., but this time the two sides aren't fighting across an old battlefield, but working together to fight what lies beneath. What lies beneath are the remnants of Agent Orange, the chemical that U.S. forces sprayed across this country to destroy tree cover in the Vietnam War. Now Vietnam is handing over 37 hectares of land outside Ho Chi Minh City to the U.S. temporarily to remove the chemical, which has been linked to cancer and other diseases, birth defects, and environmental destruction. Officials from both nations participated in an official handover ceremony Friday in Hanoi, before starting on the clean-up project in southern Bien Hoa city. "The Bien Hoa Airbase, the primary Agent Orange storage and handling site during the U.S.-Vietnam War, is the largest remaining hotspot of dioxin contamination in Vietnam," the U.S. embassy in Hanoi said in a statement. It said this marks the latest in a general effort "to cooperate on the humanitarian mission of accounting for personnel still missing from the war, and resolve wartime legacy issues including the removal of unexploded ordnance, support for persons with disabilities, and the remediation of dioxin." .