NYPD won't disclose what it does with its secret military-grade X-ray vans

The $825,000 Z Backscatter Vans the NYPD drives around the city look like regular police vans, but are equipped with powerful X-rays that can see through walls and vehicles. US Customs uses these things to scan cars and freight-containers, but only after they're sure there are no people around. (more…)