Saigon to Nha Trang is less than an hour. It is now in France/Japan.
And Air Force One. On Sep 11 we took the president on board Air Force One and the destination was unknown. This type of Boeing 747 or the new one 777/787 and Airbus 350/380 can fly 1000 km/h with the range 10k-15k without refueling.