@mipmip, I believe so. From my point of view you don't serve the country. Well, you can regard so, but this is emotional. The country will most like receive something from you, but this is true for any country you live in. On the other side you can also receive a lot of things from the USA - economic freedom, great environment for entrepreneurship, and the positivism of people who are not burdened by the historical memory of the old world.