[marktwain]

“failure to produce identification is cause for detention until identification is established.”

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Are you claiming that U.S. Citizens are required to carry ID to avoid being detained? I do not believe this to be true. I think a verbal identification can be sufficient.

[The Cajun]

“failure to produce identification is cause for detention until identification is established.”

Sounds like, "Show us your papers" kind of thing. I believe Germany back in the late 30's and early 40's had such a policy.