"Earlier this year, four scientists from the University of California, San Francisco, wrote a letter to Presidential Science Adviser John Holdren raising concerns about the cancer risks of exposing hundreds of millions of travelers every year to airport X-ray scans."
"Dr. David Brenner is equally unpersuaded by the government's response. Brenner is head of the Center for Radiological Research at Columbia University."
"And Brenner says there's reason to think the radiation dose delivered per scan is about 10 times higher than the government says. It comes from a paper by Arizona State University physics professor Peter Rez that is scheduled to appear in a journal called Radiation Protection and Dosimetry.
Rez says he was skeptical that the X-ray dose the government claims for the machines – about 1/10,000th of a chest X-ray — could produce a usable image at all. He calculated backward to figure out how big an X-ray dose would be needed to get the kind of images the machines produce."
NPR - Protests Mount Over Safety And Privacy Of Airport Scanners
"...the Electronic Privacy Information Center (EPIC), a non-profit privacy advocacy group, is taking legal action against the TSA.
Marc Rotenberg, executive director of EPIC, says the TSA should be required to conduct a public rule-making to evaluate the privacy, security and health risks caused by the body scanners."
CNN - Protesting airport body scanners, privacy group sues TSA