The image shows an old military aircraft on display in a museum. The aircraft is a P-51D Mustang, which is a twin-engine propeller aircraft used by the United States Air Force during World War II. It is painted in a dark green color with the number 31 on the side. The nose of the aircraft is pointed towards the left side of the image, and there is a small white star on the tail. The background is dark, and the aircraft appears to be on display with a railing in front of it. There is a sign on the railing that reads "P-51" and a few people can be seen in the background.