In this Dec. 30, 2009 file photo, Tanner Suttles, left, a Transportation Security Administration employee is screened by a TSA officer during a demonstration of passenger screening technology at the TSA Systems Integration Facility in Arlington, Va. Security experts have floated several new ideas to enhance airport security in the weeks since authorities say a Nigerian man on a Detroit-bound jetliner tried to ignite explosives hidden in his crotch. Some ideas are being tested, others are far from proven, some aren’t being seriously considered. Many raise questions about civil liberties and all are costly. (AP Photo/Haraz N. Ghanbari)
by Michael Tarm
CHICAGO – A would-be terrorist tries to board a plane, bent on mass murder. As he walks through a security checkpoint, fidgeting and glancing around, a network of high-tech machines analyzes his body language and reads his mind.