Careful there. Revoking a passport is not the same as stripping a person of their citizenship. The press release itself seems to create some confusion here - Sn

Careful there. Revoking a passport is not the same as stripping a person of their citizenship. The press release itself seems to create some confusion here - Snowden is not stateless because he is still a US citizen, even though he doesn't currently have a passport. Revoking a passport is routine when felony charges are filed. Citizenship on the other hand is much harder to remove, even if the US government had any interest in doing so (it doesn't in this case - it wants him back home). Naturalized citizens can be stripped of citizenship in extreme cases when they're found to have lied on their citizenship applications. I'm not aware of any circumstance in which natural-born citizens can have their citizenship removed without them voluntarily renouncing it first.