air marshal. An armed, undercover United States federal law enforcement officer traveling aboard a commercial airline as a deterrent to hijacking or terrorism. Also called sky marshal.
In context . . .
"No air marshal has ever stopped a terrorist or hijacker since the service was founded in 1962. Although an air marshal did shoot and kill a US citizen in 2005. If something really bad did happen on a flight and an air marshal was onboard they lack the training to do anything about it."
Gary Leff
View From The Wing
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