PORTLAND, Maine (AP) -- Maine's busiest airport has installed a new security system that monitors the exit doors leading from the airport terminal.
The Portland International Jetport has had a security guard who monitors the doors where passengers go from their gate area to the concourse after getting off their planes.
Jetport officials say the airport is the second in the nation to install a system with cameras and motion sensors to detect if people or objects are going the wrong way through the exit doors.
Director Paul Bradbury says the system is arguably more effective than security guards, who can get tired or distracted.
The system costs more than $400,000 but will pay for itself in four years because it now costs more than $100,000 a year in staffing to secure the area.
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