<http://schema.org/image>
<http://rack.3.mshcdn.com/media/ZgkyMDEzLzA3LzExL2UwL3N1cnZlaWxsYW5jLjhhYmQyLmpwZwpwCXRodW1iCTEyMDB4NjI3IwplCWpwZw/4f0f678d/49d/surveillance-tower1.jpg>
<http://mashable.com/2013/07/11/tech-virtual-border-fence/>