I noticed that Aidan Monaghan's paper, "Plausibility of 9/11 Aircraft Attacks Generated by GPS-Guided Aircraft Autopilot Systems," which I referred to in the previous post, isn't being displayed when I click on the link. I'll let you know if things change.
I was able to display the paper, today. A fascinating read. The abstract:
"The alleged flight performances of inexperienced terrorist pilots accused of proficiently operating complex flight control systems of four aircraft during the terrorist attacks of September 11, 2001 has surprised observers. Moreover, official information presented to demonstrate terrorist pilot control of the said aircraft has been either unverifiable or demonstrated to contain noteworthy anomalies. The flight paths of the September 11, 2001 attack aircraft bear characteristics common to the capabilities provided by precision automated flight control systems and related commercial aviation technology that emerged just prior to these attacks. The clandestine use of precise augmented GPS guided auto-pilot aircraft systems in order to perform the said aircraft attacks is hypothesized."