Body scanners being piloted in Los Angeles subway system
The machines use sensors to scan a person as they walk through, searching for firearms and explosive compounds, said Dave Sotero, a Metro spokesman.
Metro is conducting the pilot program to evaluate the accuracy and capacity of the portable machines and determine if the scanners could become permanent fixtures in the Los Angeles transit system.
The idea is that you have a continuous flow of people through the security system without causing a backlog and causing people to miss their trains.
Similar to airport checkpoints, when someone passes through the scanner, they are held for a few seconds while law enforcement officers watch a monitor that shows the location on any anomalies the body.