Thai Princess Maha Chakri Sirindhorn (R) is greeted by Vietnamese Vice President Nguyen Thi Doan as they meet in Hanoi on May 8, 2015. The Thai Princess is on a three-day official visit to Vietnam .  AFP PHOTO / HOANG DINH Nam / AFP / HOANG DINH NAM        (Photo credit should read HOANG DINH NAM/AFP via Getty Images)