Hanoi, Aug. 13 -- The Vietnam National Authority of Tourism has called on travel agencies to design and promote tours dedicated to the exhibition on Vietnam's achievements that marks the 80th National Day anniversary, with marketing campaigns targeting both domestic and international audiences. The exhibition, themed "80-year Journey of Independence - Freedom - Happiness", will run from August 28 to September 5 at the National Exposition Centre in Hanoi's Dong Anh commune. As a major national political, cultural, and social event, it will be open free of charge from 9 am to 10 pm, said Deputy Director of the authority Ha Van Sieu. The exhibition will showcase Vietnam's outstanding achievements across industry - technology, investment - tr...