From the State Department website:
In order to lose U.S. citizenship, the law requires that the person must apply for the foreign citizenship voluntarily, by free choice, and with the intention to give up U.S. citizenship.
The Supreme Court has ruled that the State Department cannot infer an intention to give up US cistizenship simply by applying for and receiving foreign citizenship.
Here is in excellent FAQ on dual citizenship prepared by a private individual.
http://www.richw.org/dualcit/
The guy has obviously done a fair amount of research and cites to many sources.
Originally Posted by SJCFlyerLG
Hmmm... I read this section, and I am as confused as ever. To paraphrase, it states that the US recognizes dual nationality, but if an adult applies for it, they may lose US citizenship. Now in my case, I think I already am a British citizen by virtue of birth prior to 1983, so I would not be subject to the previously mentioned may. But I wonder, under what conditions would the US strip citizenship from someone applying to be a dual national? I have some speculation, but I'll reserve it for OMNI.