Buenos Aires, June 19 -- After more than three decades making documentaries in over 80 countries, renowned Argentine filmmaker Ricardo Preve says what impressed him most about Vietnam was not only its history and landscapes, but also its remarkable ability to rebuild, overcome adversity and achieve rapid development after decades of war. Speaking to Vietnam News Agency correspondents in Buenos Aires while completing his documentary A Price We Have to Pay, Preve described Vietnam as a powerful example of national resilience and determination. The documentary, filmed in Argentina and Vietnam, centres on Argentine war correspondent Ignacio Ezcurra and the decades-long effort to uncover the circumstances surrounding his death during the war i...