Holds dual citizenship.
I don't think the US allows dual citizenship.
Yes we do. I have dual citizenship.
Dual citizenship is rare.
How did you get it, PADem?
The US doesn't actually recognize dual citizenship, but rather recognizes that some US citizens may be regarded by other states as being their citizens.
The US can not strip someone of their US citizenship. A US citizen may voluntarily relinquish their US citizenship by certain overt acts. Over time, these acts have had to become more overt and substantial. For example, at one time if a US citizen female married a foreign male and the couple was domiciled in his country, then the female was regarded as having relinquished her citizenship (and could not transmit citizenship to her children). Nowadays, a US citizen can participate in a naturalization ritual in a foreign country and would remain a US citizen.