The concept is like security at amusement parks, where people are screened as they walk past pillar-style scanners.

As part of a one-year pilot program, the weapons detection technology was introduced to riders on Monday at Metro's Norwalk Station on the Green Line and San Pedro Street Station on the Blue Line.

Metro passengers at the Norwalk station will be among the first to be screened for concealed weapons as part of the transit system’s ongoing safety campaign.  The enhanced screening system will be