Tan Tri doesn't know a thing about Agent Orange. But doctors say he lives with its effects every day, when he crawls off his wooden bed and waits for someone to feed him. He is 25.

His mother Vo Thi Nham was exposed to Agent Orange when U.S. forces showered the chemical across swaths of Vietnam half a century ago to destroy jungle cover of its wartime enemy.

Nham believes it's the reason her son was born physically and mentally disabled.