Privacy advocates worried about x-ray scanners making their way around U.S. airports may be surprised to know the technology is also making its way onto America's streets.

The Department of Homeland Security, the U.S. military and even local law enforcement agencies are buying and deploying mobile X-ray vans that can see into the interior of vehicles around them.

The Z Backscatter Van (ZBV), manufactured by American Science and Engineering (AS&E), can be used to detect contraband such as car bombs, drugs and people in hiding.

But the vans, which can also see through clothing and into some buildings, are raising privacy concerns as well as questions about health risks -- and what might happen if the technology gets into the wrong hands.

FoxNews.com - X-RAY VANS: Security Measure, or Invasion of Privacy?