Why would they do this? Do they consider him a flight risk? Look at the property receipt:

documents
boxes
executive grant of clemency for Roger Stone
info re: the president of France
leatherbound box of documents
various classified/TS/SCI documents
potential presidential record
binders of photos
handwritten note
miscellaneous secret documents
miscellaneous top secret documents
miscellaneous confidential documents

Do you see "passports" on there? I sure don't.

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Onward and upward,
airforce