Support WBURIn Vietnam, There's Hope North Korea Will Follow Its Model For Economic SuccessPlay04:33Download AudioMichael SullivanFebruary 26, 2019 ShareAt a war memorial in Bac Giang province, Duong Van Dau views the tombstones of North Korean pilots killed during the Vietnam War. Headstones are etched with the names of the dead in Korean on one side, and Vietnamese on the other. (AFP/Getty Images)