Major Fellowship Activities: Ung updated a Peace Action Education Fund fact sheet entitled “Landmines: Mass Destruction in Slow Motion.” She then organized a Landmine Activist kit, which included her factsheet and other related materials produced by PAEF and other groups. This kit was distributed to grassroots groups and members of the U.S. Campaign to Ban Landmines (USCBL) to gain support for the “Ottawa Treaty,” a landmine treaty outside of the United Nations forum. She then worked with the USCBL to organize a rally at Lafayette Park, across the street from the White House (on May 16, 1997) to ban landmines. She helped with the logistics, including the gathering of thousands of shoes to represent people who lost their lives to mines, and also was the emcee of the rally. The rally received coverage on Voice of America. Ung also attended many meetings of the USCBL and the Arms Transfer Working Group of the Monday Lobby Group.
Current Activities: Ung is a part-time Spokesperson for the Campaign for a Landmine Free World, a program of the Vietnam Veterans of America Foundation. She travels extensively in the United States and overseas speaking on the issues relating to landmines, child soldiers and other human rights. She serves on the U.S. board of directors of Grapes for Humanity, an organization that raises funds for humanitarian efforts, including for victims of landmines. Her autobiography, First They Killed My Father: A Daughter of Cambodia Remembers, was published in January 2000 by Harpercollins. The sequel, Lucky Child: A Daughter of Cambodia Reunites with the Sister She Left Behind, was published by HarperCollins in April 2005