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http://www.kmov.com/topstories/stories/kmov-stlouis-news-090601-shoe-bomb-threat.4672f28b.html
When a flight attendant asked him to close his laptop after boarding, Shafermeyer says he was just trying to make a joke when he asked her, “Are you the one who checks for shoe bombs?”
That comment got the guy 3 days of solitary confinement.
Constitutional guarantees? Not in the US.