U.S. Citizenship and Naturalization.#U.S. Passport, #Transmission, #Dual Citizenship.
United States Citizenship can be acquired by being born in the United States, Puerto Rico, or upon fulfilling certain conditions, the Canal Zone or the Republic of Panama among others. A child can also acquire US citizenship even if they are born outside the United States to a U.S. citizen. U.S. citizenship can be transmitted from generation to generation as long as the people meet all other legal requirements. There is an option to obtain a U.S. passport or a Certificate of Citizenship with U.S. Citizenship and Immigration Services. If the funds are there, I recommend doing both. A child can also acquire U.S. citizenship by adoption.
If you are over the age of 18, you are not already a U.S. Citizen, and you meet all the other eligibility requirements, you can file an Application for Naturalization. USCIS will review your application and grant or deny it within 120 days. A denial can be appealed.
U.S. does not like, but does not forbid, dual citizenship.