TSA is testing X-ray portal for vehicles A new X-ray technology is being tested that could stop potential terrorists from blowing up a car bomb at one of the nation's airports, homeland-security officials say. The Transportation Security Administration is running a test at a North Carolina ferry terminal of a 21-foot-high archlike machine that shoots low-intensity X-rays at cars as they pass through. The photos show whether explosives or drugs might be in the car. The technology, called backscatter X-ray, is in use at several airports to screen passengers. Privacy advocates have denounced scanning people as invasive because the X-rays can see through clothes. Melissa Ngo, a Washington, D.C., lawyer who focuses on privacy issues, says using the technology for cars could pave the way for Big Brother government spying....If this is just an "anti-terrorism" device, why are they scanning for drugs?