pickens writes "Forbes reports that the same technology used at airport check points, capable of seeing through clothes and walls, has also been rolling out on US streets where law enforcement agencies have deployed the vans to search for vehicle-based bombs. 'It's no surprise that governments and vendors are very enthusiastic about [the vans],' says Marc Rotenberg, executive director of the Electronic Privacy Information Center. 'But from a privacy perspective, it's one of the most intrusive technologies conceivable.' Rotenberg adds that the scans, like those in the airport, potentially violate the fourth amendment. 'Without a warrant, the government doesn't have a right to peer beneath your clothes without probable cause,' Rotenberg says. 'If the scans can only be used in exceptional cases in airports, the idea that they can be used routinely on city streets is a very hard argument to make.'"