The report's findings illustrate the uphill challenge that those who favour building fences and walls to keep Latin American immigrants out of the United States face.

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The tragedy occurred when thousands of fans were let in through a gate into an already crowded standing area, leading many to be crushed against metal fences and concrete walls.

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In all these neighborhoods, graffiti on the fences, walls and buildings adjacent to the Caltrain tracks were updated frequently, sometimes with highly ornate, mural-sized efforts.

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Developed by the University of Minnesota using funding from DARPA, the Recon Scout resembles your average barbell weight, but when you're not workin' those triceps, this little fellow can be heaved across flatlands, over fences, and into brick walls in order to secure a location and start feeding back video of its surroundings.

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The property, he said, is closed in by stone walls and fences and has four separate entrances.

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The results of this study indicate that solutions cannot be found in simple measures like building walls and fences, putting up bars, using metal detectors, or employing private security services.

UNESCO: Social Sciences

The Jews live behind walls and electric fences.

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Israel's security regime rests on a network of walls, fences, barriers and permits.

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