Nothing like a fence and an in-your-face sign to take the joy out of plane watching. Some small airports don't have many barriers to photographing aircraft while mid- to large airports heavily restrict visual access, let alone casual wandering. In this case a Subair.com (short for Suburban Air Freight) craft sits ready for its next frieght or personnel airlift assignment. Options for the observer is to put up with the wire fence distraction or to peek through the mesh. As a photographer I vote for sticking the lens through the fence and snapping away. Besides, like the song says 'Do this, don't do that, can't you read the sign?' can make for a more dramatic photo.