2 methods, born on US soil (embassy, army base)
naturalization. Under the new rules since 911 commiting a felony can have your naturalization revoked and deported if you were the prime naturalizee. Probably would not apply to a naturalized minor.
Here are the requirements, also note the 14th ammendment. [link|http://www.uscis.gov/graphics/services/natz/index.htm|http://www.uscis.gov...es/natz/index.htm]
thanx,
bill