9/11 was an event so visually powerful, it was burned into the minds of those that witnessed it. Visually it made an impact. Psychologically it made an impact. A 'terrorist' attack on a scale not previously witnessed. Four planes 'hi-jacked', Four impacts, Four buildings either damaged or completely destroyed.
An event that made the world sit up and pay attention. An event that was...too big.
We Three Things:
9/11 was all about the 'threat from the sky'. Within the main event of 9/11, there was three sub-events. We had:

Multiple 'hijacked' aircraft as threats in the sky. Multiple impacts. Multiple buildings crashing down to earth.
Threats from the sky. Impacts. Crashing to earth.
Threat from the sky. Impact. Crash into earth.
The combined message from those paints a pretty grim picture. However, we can also take the events individually and they are also suggestive/symbolic of the same thing.
They are telling you and showing you multiple times what is to happen. They are repeating what is important.
The message, at this point, is simply 'Impact'.
The inevitable movie connection:
After the two planes impacted the towers and before the towers fell, we had a real-life scene reminiscent of a scene from a 1998 movie.

Armageddon. A movie about a space object threatening earth. An earth threat.
The Over View:
They are repeating what is important. Four becomes important.
Flight 11 originated from Logan International (Boston), impacted the North Tower.
Flight 175 originated from Logan International (Boston), impacted the South Tower.
Flight 77 originated from Dulles International (Washington), impacted the Pentagon.
Flight 93 originated from Newark International, impacted a field in Shanksville.
All locations involved that day plotted on a map:

Four distinct locations. The locations visually resemble the belt stars of the constellation Orion, only mirrored. If we take an image of the belt stars, mirror it and then overlay it on the image of the locations, we can see how close a match they really are.

The mirroring of the belt stars is fully intentional, to help explain why, we will let a Freemason explain the significance of the Washington monument and the reflecting pool it is deliberately paired with.
From the episode of Ancient Aliens - Aliens and the Founding Fathers (well worth watching if you are not familiar with the symbolism of Washington DC):
Watch from 32:00 minutes for an explanation of the Washington momument and the reflecting pool it is paired with.
Freemason Akram Elias, Past Grand Master of The Grand Lodge of Washington D.C has the following to say:
We have a reflecting pool, why? To reflect the obelisk. Washington's monument points to the heavens, with the reflecting pool it points below. There is a direct correlation between what happens here below and what happens up there.

What Akram has described here is the Hermetic axiom: As Above, So Below.
The mirroring of the belt stars is a reflection of what is above, suggesting what is in space, will be on earth.
As Above, So Below
What is above, will be below.
What is in 'heaven', will be on earth
"Heaven and Earth are about to collide."
But why Orion, why the Belt stars, what is the significance?
We Three Kings:
Orion has been important throughout ancient history, in many different cultures. One of the most well known connections is with ancient Egypt. It is said that these stars represent the resting place for the soul of Osiris. Osiris was the most revered of the Ancient Egyptian Kings, he was seen as the saviour of ancient Egypt. He was a Great King.
There is also, a more simple and elegant explanation:
The belt stars of Orion are also known as 'The Three Kings'.
The three kings (wise men) heralded in the arrival of a Great King. (Many of the Christian faith label Jesus as 'Jesus, Our King').
Whether it is Osiris, or Jesus, both were considered to be Great Kings, both were considered Great Kings of Earth.
Whichever you choose, the symbolic message tells us the same thing:
From Space will come a Great King of Earth.
The second coming? Was Jesus a space alien? I wouldn't go holding your breath just yet.














