General purpose hobby circuit of a simple light fence security beeper is presented here. This circuit can be used as a door alarm, gate alarm, pathway alarm, etc.

The concertina wire installed under the Trump administration to reinforce the U.S.-Mexico border is now being stolen and used to protect Tijuana residences as the city grapples with a surge in crim… ...

Thieves are stealing and selling the same concertina wire installed in November along the border by the Department of Homeland Security, and 15 to 20 arrests have already been made, city officials ...