By Olga Kharif

Scanning for Safety

The failed attempt to blow up a Northwest Airlines plane on Christmas Day is leading to calls for wider use of airport explosive detectors. The U.S. and several other countries plan to step up their use of full-body scanning technology in the aftermath of the near-miss. This Bloomberg BusinessWeek slide show examines the most up-to-date machinery now being used to detect bombs and other potentially harmful objects carried close to a person's body or buried within luggage.