Reasons Pertaining To Why 11th September 2001 Date Was Chosen.

a reply to: Oblique9043

You left out the Hen·dec·a·gon..IX is 9.
There was a north and south tower maybe a Mason Dixon line running between them?
The project was originally planned to warn away FTL time traveling alien ships that were traveling to Earth searching for intelligent life.
The aliens were expected to have advanced gear that would detect signals from the entire EM spectrum as well as gravitational anomalies.
Receiving the earliest Earth broadcast television shows the aliens were to be warned that there might be danger which their gravimetric data would soon confirm.

Some of the Palestinian talks did happen in Moscow and over the years the city has suffered from terrorist action, one that comes to mind is the Moscow Theater Hostage Crisis, link below:-
en.wikipedia.org...
I will look at the astronomy of the attack tomorrow!
Talks in Moscow mentioned below:-

www.paljourneys.org...

The attack from above link happened after Sunset on 23 October 2002 in Moscow, therefore ancient Greek day marker applies on actual day, as Sun set at location, Sirius was on True North or Nadir, astronomy graph below:-

At that location there is a tag with "Circus of Dancing Fountains" in Russian.
Sounds old like about 1967?