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Stop hand gesture, no trespassing. Senior forest ecologist is working in the woods. In the uniform.
Restricted zone in the streets of Chicago marked by yellow protective banner. Firetruck in the blurred background
A No trespassing sign posted on the perimeter fence at the Mojave Air & Space Port, Chaffee, California
A danger/trespassing sign is latched to a fence to alert the public about a nearby construction site.
Private Property No Trespassing sign on blue wall

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