This does seem pretty weird that the North Koreans would be flying a model F-16 during one of their airshows unless it was being used as part of dogfight demonstration of some kind?:
Now here’s something you don’t see every day: an F-16 fighter jet buzzing through the skies of North Korea and launching — fireworks.
The plane roaring over people’s heads at the country’s first air show Sunday was actually a remote-controlled mock-up of the fabled U.S Air Force fighter.
The scale models of the F-16 and a Chinese J-10 fighter were featured on the second day of the Wonsan International Friendship Air Festival.
The choice of flying a one-sixth scale F-16 at the show was an odd one considering the outrage North Korea regularly expresses over the presence of U.S. troops and Air Force bases in South Korea. [Associated Press]
You can read more at the link.