I would be tempted to question the "American" label on this one, but just the other day I saw a woman, dressed just this way, driving next to me with a very large American Flag draped over her dashboard. Although it was backwards, not upside down though, a common mistake.
You don't know why she is wearing a chador. She may have had to travel through an area where kidnapping was a threat.
I agree, I doubt the Citizenship tag.