This famous experiment to test both velocity and gravitational dependent Time Dilation was conducted using commercial jets in 1971. The experiment was a great success. However, they only used 4 atomic clocks, which seems too few. Also, atomic clock technology has improved greatly since 1971. I would like to see a repeat of the experiment being conducted with more clocks and perhaps using supersonic jets. Which organization do you think would be willing to conduct such an experiment?