My understanding is a VALID Federally Recognized ID is required. You can check out the TSA.gov website which is probably a better resource then here.
No, it has to be valid.
No. You must have a valid State ID or DL or US passport
No
Required Documents: Valid Passport AND 1 other form of government ID (Driver's License, I.D. card, or Permanent Resident Card) Required Documents: Valid Passport OR other form of government ID (Driver's License, I.D.
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