A segment from a U.S. Air Force film follows a single flight by then-Major Charles “Chuck” Yeager. Before Yeager and Air Force test pilots Albert Boyd and H.E. “Tom” Collins put the MiG-15 through its paces, technicians inspected it for signs of sabotage and determined it was safe. The MiG was tested to find out how it performed in comparison with the U.S. frontline fighter, the North American F-86 Sabre, which in the film joins up with Yeager for part of the flight.
Source: Chuck Yeager Flies the MiG-15 | Air & Space Magazine