Wandering man gets by JFK security

A man who escaped a Virginia mental hospital jumped a fence at Kennedy Airport and wandered the taxiways — after he waltzed right past a multi-million dollar security system , the Daily News has learned.

A JFK employee found Mark Mogensen, 20, aimlessly walking along taxiway 2 about 11:20 a.m. on July 16.

Mogensen’s clothes were damp and he admitted he swam across Jamaica Bay and climbed an eight-foot fence to get to the Queens airport.

“I swam across the river and jumped the fence,” Mogensen (photo) told Port Authority police officers, accordto ing court records.

Mogensen did not have identification on him, but cops later learned that he escaped the Inova Mount Vernon Hospital in Alexandria two days earlier, after swiping an employee’s badge.

He committed himself to the facility and was diagnosed as having a mood disorder with paranoia, sources with knowledge of the case said.

Port Authority police charged Mogensen with criminal trespass.

The surprise breach raised questions about the Port Authority’s Perimeter Intrusion Detection System, a $100 million plus security network that many say has never worked properly.

The system, which uses surveillance cameras and motion sensors was temporarily down in the area where Mogensen got onto the property, a source said.

“No one should be able to go onto a restricted aeronautical side of an airport, next to a runway, at one of the world’s busiest international airports." Paul Nunziato, the president of the Port Authority Police Benevolent Association.