It is free within the airport and $5 to reach the subway stations outside the airport perimeter.

When the Jalalabad attack began in March, rebels reached the airport perimeter within hours before being driven back.

Customs officials stopped the cars and insisted in processing the packages before they could be removed from the airport perimeter.

After 9/11, the woodsy airport perimeter itself was closed to riders.

A complete trip on 25 miles of trails around the airport perimeter costs $125, which includes lunch at one of several nearby restaurants.

The plane continued on the ground outside the airport perimeter and broke apart causing injuries.

Fully two hundred bombs had fallen within the airport perimeter, and nine of them had found runway targets.

They're patrolling the airport perimeter, and there are several machine-gun emplacements.

The missiles were fired from immediately outside the airport perimeter.

The crash occurred within the airport perimeter when the aircraft was already airborne, nine feet off the ground.