I think it's proof enough that individuals are the wrong place to focus, that people from much-skinnier countries who visit the US often report gaining quite a

I think it's proof enough that individuals are the wrong place to focus, that people from much-skinnier countries who visit the US often report gaining quite a bit of weight, even if they try to keep it under control. How are the natives supposed to do any better than foreigners who are starting fairly trim and bringing healthy habits with them from home? The problem is clearly environmental/cultural and must run damned deep if it's that hard to avoid it. Which is terrible news because that's damn hard to fix without top-down initiatives, the likes of which the US has been allergic to since the '80s (though we didn't used to be). [EDIT] By "visit" I mean for years, not tourists.