Geneva, April 30 -- Ambassador David Fernandez Puyana, Permanent Observer of the Permanent Delegation of the University for Peace to the United Nations Office and other international organisations in Geneva, has praised Vietnam's peace building efforts as well as the country's socio-economic development and international integrational achievements. In an interview granted to the Vietnam News Agency (VNA)'s correspondents in Geneva on the occasion of the 50th anniversary of the liberation of the South and national reunification of Vietnam, Puyana acknowledged that the victory on April 30, 1975 was a significant milestone in the country's history, as well as for the world during that period, as it marked a day of reunification for the Vietn...