Citizenship of the United States
A person who is considered a citizen by more than one nation has "dual citizenship". It is possible for a United States citizen to have dual citizenship; this can be achieved in various ways, such as by birth in the United States to a parent who is a citizen of a foreign country (or in certain circumstances the foreign nationality may be transmitted even by a grandparent) by birth in another country to a parent(s) who is/are a United States citizen/s, or by having parents who are citizens of different countries. Anyone who becomes a naturalized U.S. citizen is required to renounce any prior "allegiance" to other countries during the naturalization ceremony; however, this renunciation of allegiance renunciation of citizenship to those countries.
Citizenship of the United States
American Samoans continue to be U.S. nationals but not U.S. citizens. People born in American Samoa receive passports declaring the holder is only a U.S. national, not a U.S. citizen. For an America Samoan to become a U.S. citizen, he or she must relocate to another part of the United States, initiate the naturalization process, pay the $680 fee (as of February 11, 2014), pass a good moral character assessment, be fingerprinted and pass an English/civics examination.