Hanoi, Feb. 24 -- Deputy Prime Minister and Foreign Minister Bui Thanh Son and Thai Foreign Minister Maris Sangiampongsa on February 24 visited the Thang Long Imperial Citadel, a world cultural heritage site in Hanoi, as part of the latter's official visit to Vietnam. The two officials' spouses joined on the trip. They explored Vietnam's thousands-year history through the artifacts preserved at the UNESCO-recognised site, which highlights the historical significance of the capital. Before concluding the visit, they enjoyed coffee together and discussed the relationship and potential cooperation between the two countries in culture and education. They agreed that enhancing cultural exchange would bring Vietnam and Thailand closer together....