The plane, a F-15, flipped on its back was a non-flying display aircraft, often called “gate guards” because they are either near the airbase gate or the flight line. In the same display area are a: F-4 Phantom, F-86 Sabre, and a F-102.
An example of a literal gate guard is the F-105 Thunderchief that is on a pedestal at the entrance to Bolling Air Force Base in Washington, DC. It is a ‘memorial’ to the last fighter squadron that was based at Bolling, it flew F-105s.
That’s where I was born. 8>)