Joe Strummer would be proud

On the way to the airport, a man sang along to "London Calling" by The Clash in a taxi.
The taxi driver recognized this immediately as terrorist activity and reported it to authorities.
The singing man was removed from his flight and detained. He was later released having missed his flight.

"London calling at the top of the dial. After all this, won't you give me a smile?"
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Just a few weeks ago, BART stopped all service because a patriotic citizen reported hearing two men say "bomb".