Vietjet CEO Nguyen Phuong Thao (far R) and Airbus Commercial CEO Fabrice Bregier (far L) take part in a signing ceremony as France's President Francois Hollande (2nd L) and Vietnam's President Tran Dai Quang (3rd R) look on, at the Presidential Palace in Hanoi on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images