Every time he lands at Noi Bai International Airport during his working visits to Viet Nam, Dr Nguyen Hong Son can clearly feel his heartbeat blending with the renewed rhythm of his homeland. The changes across the country — whether in the thousand-year-old capital of Ha Noi, the gentle land of Hue, or the dynamic Ho Chi Minh City — are reflected in every road, every new structure, and every youthful face filled with energy.