This one was pretty interesting:

3-D Holographic Body Scanner for Better Airport Security

Researchers at the U.S. Department of Energy's Pacific Northwest National Laboratory have developed a new technology that provides 3-D holographic imaging that can rapidly identify hidden weapons—even non-metallic weapons—through the clothing of airline passengers.

The September 11 terrorist attack on the World Trade Center in New York and the Pentagon in Washington, D.C., using hi-jacked commercial airliners has sparked stringent security measures at airports across the nation. Passengers and their luggage are being physically searched before boarding every flight.

The new wideband millimeter-wave holographic imaging system developed by the Pacific Northwest National Laboratory for the Federal Aviation Administration to screen airline passengers for weapons has the potential to augment security processes and also preserve efficiency as well as a measure of personal privacy.

Image Credit: www.pnl.gov/energyscience/.

Concealed weapons made of plastic, ceramics, and metal can be detected with the holographic imaging system called the Personal Security Scanner. The holographic imaging system offers distinct advantages over surveillance systems that rely on metal detectors or X-ray imaging. Metal detectors cannot screen for plastic or ceramic weapons. The holographic imaging system can identify metallic and nonmetallic guns concealed under clothing, and also has the potential for detecting plastic explosives.
(Source)

They had this on TV a few months back. They showed a male reporter being scanned, but the network sould not allow a woman to be scanned for broadcast as it would be far too revealing.

It was pretty revealing for the male reporter, btw.

The device was set up here at Port Columbus on a trial basis, only scanning people who were briefed on the device and wanted to try it out. Completely voluntary at this point -- but...

* 3-D scanners readied for airports, Energy Department says
Tom Paulson -- Seattle Post-Intelligencer
September 13, 2001

Dan