#15: Continue the war there when you could keep doing important space missions.
(Yes, that's why there hasn't been a moon landing in 50+ years. Fuck you, Nixon.
EDIT:
Just talked to a Vietnamese guy about this; he says there's a lot more reasons why Vietnam is favorable towards the US (he came off to me like he felt "friends" was a stretch). Aside from centuries' worth of China hatred, there's also some admiration towards the US for its ideals and wealth—government forms usually have "Independence - Freedom - Happiness" on them, and the declaration of independence from France in the 1950s was based on the US' own (ironically enough).
Also, he said HCM's real corpse is hidden somewhere and that unexploded ordinance should be "[dug] up and [sold] to the locals". Motorcycles actually do try to steer clear of people, apparently, they get fined if they hit them.
He didn't get the one about Bhuddists.