<https://americansecuritytoday.com/covert-perimeter-sensors-for-next-generation-intrusion-detection/>
<http://schema.org/datePublished>
"2021-11-15T03:35:35+00:00"^^<http://schema.org/Date>
<https://americansecuritytoday.com/covert-perimeter-sensors-for-next-generation-intrusion-detection/>