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Following two security breaches earlier this summer, Hartsfield-Jackson International Airport in Atlanta, Georgia, has begun installing concertina wire on fencing around the airport perimeter.

Researchers from the U.K.-based penetration testing service Pen Test Partners recently attacked a video surveillance system, and they pulled off a fairly scary feat. “We successfully switched video feeds from one camera to another through the cloud service, proving arbitrary access to anyone’s camera,” they wrote.

As fans begin to trickle into Citi Field in New York City, home of the Mets, a room behind center field is already on full alert, monitoring for potential risks that could affect fans, players, employees and property.

The public transit system in Los Angeles has announced that it is the first in the U.S. to purchase millimeter wave scanners to screen metro riders for suspicious objects as they move through stations.