In 1994, Zumwalt and his father came to Vietnam for the first time after the Vietnam War, to see Vietnamese veterans and to cooperate with the Vietnamese government to research and seek ways to solve AO consequences. In the last 17 years, Zumwalt has come to Vietnam over 50 times and interviewed over 200 veterans. His awareness of the Vietnam War has changed.
“When my father told me to go to Vietnam with him for the first time, I persistently refused because my heart was deeply resent because of the death of my brother. But he persuaded me to go to Vietnam to learn of people over the front line. Meetings with them have made me change completely,” Zumwalt said.