I did meet a former Marine (who was a door-gunner on a machine gun on a Huey) who was working in Hanoi as a consultant for some type of airport business.
BTW, Viet Nam is highly respected for its cuisine. Pho Bo or Pho Ga is available everywhere and is eaten for breakfast, lunch, and dinner. This simple staple consisting of a salty broth, fresh rice noodles, a sprinkling of herbs and chicken or beef, features predominately in the local diet -- and understandably so. It’s cheap, tasty, and widely available at all hours. Another delicacy was Banh Xeo. It looks like a large pizza dough fried in a large flat skillet, then folded over like a giant taco, bulging with pork, shrimp, and bean sprouts, plus the garnish of fresh herbs. You cut it up into cut it into manageable slices, roll it up in rice paper or lettuce leaves and dunk it in a special sauce and eat it by hand.
Lord only knows some of the things I ate that were unknown to me.....
But everywhere I went, there was bottled water to drink!!! And as steamy hot as it was, you didn't get ice unless you were in a nice restaurant. You had to take every precaution against dysentery!!! And Praise God, .... I had no stomach issues at all!!! Glory!!!