A commemoration of the 50th anniversary of the Vietnam War begins Thursday at the Mall of America, put on by the Minnesota Department of Veteran Affairs. The three-day event includes a Veteran Resource Fair and a traveling tribute wall. And it also includes a National Oral History Project, with veterans sharing and recording their stories.Marc Henderson is a historian who is working nationwide to collect stories of veterans. Chuck Jones is a three-time Purple Heart recipient and Vietnam Veteran from New Brighton. Both joined MPR News guest host Nina Moini to talk about the importance of preserving the history of Vietnam Veterans.