More from my recent visit. These images came from a roll of 14 year-old slide film I had forgotten in the camera; they look a bit thin after having been processed, but still produce usable images after having been neglected for so long.
This is the original terminal concourse for National Airport (otherwise known as Ronald Reagan Washington National Airport).
This is a continuing dialog with my latest quiz participants, which kind of fell off after a couple of days. Here is another image to draw clues from, with the original image. Remember, it has already been deduced that the image has some sort of relation with the Civil Air Patrol, but the final answer is still waiting to be found.