This argument from authority fallacy argument of "frequency analysis" is bull$hit....in the sense that, we have the video. Video and audio...do not lie. (Unless they have been manipulated...a definite possibility)./
Missels that break the sound barrier...are hard to analyze.
Under such microseconds, which the human brain cannot detect...the Doppler Effect is clearly audible, though faster than we can detect it.
Time to INVESTIGATE the investigators of 9/11. PROSECUTE the prosecutors. EXPOSE the cover-up.