Rotenberg said he still has privacy concerns about millimeter wave machines, including what information is captured by the machine -- even if unseen by screeners -- and how long that information is retained.
There is a mad race today to equip our credit cards and our cell phones to act as credit devices, allowing us to merely wave our credit or debit card or smart phone at a vending machine to have it deduct the price of the object from our bank account or add it to our credit card account.
Using millimeter wave technology, which the TSA says emits 10, 000 times less radio frequency than a cell phone, the machine scans a traveler and a robotic image is generated that allows security personnel to detect potential threats -- and, some fear, more -- beneath a person's clothes.