As part of their ongoing State visit to Viet Nam, King of Thailand Maha Vajiralongkorn Phra Vajiraklaochaoyuhua and Queen Suthida Bajrasudhabimalalakshana laid a wreath and paid tribute to President Ho Chi Minh at his Mausoleum, and laid a wreath at the Monument to Fallen Heroes on Bac Son Street in Ha Noi on the morning of September 16.