Atlanta Airport

An investigation by the Associated Press uncovered up to three incidents since 2007 when intruders reached runways at Hartsfield-Jackson Atlanta International after getting past security fences or gates at the airport's perimeter.

The report says the breaches happened in 2007, 2012 and again in 2014.

Nationally, there were 268 breaches at 31 major U.S. airports between January 2004 and January 2015.

Incidents ranged from fence jumpers taking shortcuts and intoxicated drivers crashing through barriers, to mentally ill intruders looking to hop flights. None of the incidents was terrorism-related.

Airports say breaches are relatively rare. Security measures typically include fences, cameras and patrols, but there are gaps. Not all of the miles of fences are routinely patrolled or covered by video surveillance.

Tags: airport breaches, hartsfield jackson atlanta international airport, Atlanta airport, intrusions atlanta airport