Is a roving, body-scanning van a needed surveillance tool or a another step toward eroding personal privacy? Andy Greenberg of Forbes is reporting that American Science & Engineering, which provides x-ray scanners to governments and defense companies, has introduced a van capable of scanning nearby cars. The Z Backscatter Vans, or ZBVs, are used to scan for explosives, drugs and people, making them an ideal tool for security, law enforcement and border control agencies. The vans work by emitting low-level x-rays off and through nearby objects to collect a visual snapshot of other vehicles. Read the full story at Mashable.