Denver airport to try tailored security screening

Lines to be organized for 'casual', 'family/special needs' and 'expert' travelers

So far, whole-body imaging has primarily been used as a secondary screening technique, in lieu of a hand pat down of passengers who set off an alarm at a metal detector and require further screening.

Hawley said millimeter-wave portals offer the potential of being used for the "primary," or initial, screening of passengers.