TSA Federal Security Director Brian Johansson says it helps ensure the highest level of security against terrorism.
"Our adversaries are really focusing on non-metallic improvised explosive devices. So anything that has metal in it we can detect. Those metal detectors are great at detecting metal but our biggest threat right now is the non-metallic IED. This technology allows us to find non-metallic things that are hidden on a person's body under their clothes."
If an object is detected on a passenger, a TSA officer can find out if it's keys, or a cell phone or something of more concern. Johansson admits some people were uncomfortable with full body scans initially, but he's confident passenger privacy is protected.
"This is what I call the gingerbread man or gingerbread woman. So whether you're my height, this tall, this wide or this thin it's the same image male or female. It just doesn't matter that's what we see."