katysails wrote:
I thought you couldn't hold dual citizenship in the US unless you
were under
18....

That's a widely held misconception, and it's simply not true. The US
does not require dual citizens to choose one citizenship when they
reach a certain age.

Some other countries do have this type of requirement. So, a person
who
was a citizen of both the US and a country with such a requirement
would have to choose only one citizenship. But, it would be the other
country that is forcing him to make the choice, not the US. If neither
country requires a choice, then the person
can remain a dual citizen for life.

This website discusses the US policies on Dual Citizenship, along with
the many misunderstandings surrounding it. It is, surprisingly,
allowed in many/most cases.

http://www.richw.org/dualcit/

Stephen Gallagher