an armed plainclothes federal marshal riding on an airliner to protect against skyjacking.
an armed security guard on a commercial aircraft
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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The sky marshal's seat is one less that they can sell at a premium.
Reclaiming my time, the sky marshal program was established by.