A woman undergoes testing by the GK-1 lie detector, a prototype of which is in use at a Russian airport, in this handout picture released November 17, 2005 by Nemesysco. A new walk-through airport lie detector made in Israel may prove to be the toughest challenge yet for potential hijackers or drugs smugglers. Picture taken November 17, 2005. To match feature Security Lie Detector REUTERS/Handout