Naturalization is the process that if you provide all the paper work needed you can become a legal U.S. citizen and vote under law federally. The process is fair because there are many steps before hand that allow other citizens to have temporary citizenship or permanent citizenship with limitations, such as a visa or a green card.
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The grants allowed industries in the West to grow because they encouraged settlement and new industrial opportunities.
Yes it is the same, but Kim Jong Un says that the North Koreans's speak a more "pure" form of the language.