Culture
Although anti-U.S. sentiment was once very strong in Vietnam in the years following the end of the War, modern-day Vietnam is much more tolerant and accepting of U.S. cultural influence. Travelers from the U.S. typically find that locals are very hospitable.
When greeting someone of authority, gently grab both of their hands and slightly bow, and always greet people in descending order of authority. It is rude to summon a person with the index finger.
The Vietnamese do not wear shorts in public except when at the beach or at a work site. Foreigners are advised to do the same, especially when visiting more rural areas.