Found and Explained Official on MSN

NASA’s secret F-15 - The test jet that helped create modern fighters

Before the F-22 entered service, NASA and the US Air Force used a heavily modified F-15 to explore ideas that seemed years ...
来自MSN

The F-15 that was more advanced than the F-22

During the Cold War, U.S. planners worried that modern fighters might one day be forced to operate from damaged or shortened runways. That fear drove an extraordinary experiment: turning a standard ...