PHOENIX (AP) - A dozen times in the past decade, people have breached the perimeter security fences or gates at Phoenix's international airport, including a woman who drove her car onto the runway and a man who banged on the side of a jet.
The 12 are among the 268 breaches nationally that an Associated Press investigation found at 31 major U.S. airports from January 2004 through January 2015.
Airports say breaches are relatively rare. But not all of the miles of fences are routinely patrolled or covered by video surveillance.
The Phoenix Sky Harbor International Airport incidents came despite numerous security upgrades after the Sept. 11 terrorist attacks.
Airport officials spent $10 million on upgrades after a man crashed a stolen pickup and drove onto the runways in 2005.
Copyright 2015 The Associated Press modified.