I would think because those who FORM the thoughts and fears of the American people know that it was a DETINATION and not what they have told us to believe!
GROUND ZERO refers to the immediate area below an explosion or detonation of some type of weapon. It also, coincidentally, refers to the starting point of an activity. It could be for both of those reasons that directly after the 9/11 ATTACKS IN NYC , the place where these attacks were carried out first (as opposed to the Pentagon and Shanksville, PA) and the immediate area surrounding it were called "GROUND ZERO".
At Ground Zero was created in 1994.
Picture of ground zero
The duration of At Ground Zero is 1.87 hours.
Ground Zero Man was created in 1971.
Live from Ground Zero was created in 2001.
Love from Ground Zero was created in 1998.
Party at Ground Zero was created in 1985.
Ground Zero Gallery was created in 1984.
The term ground zero describes the point on the Earth's surface closest to a detonation. In the case of an explosion above the ground, ground zero refers to the point on the ground directly below the detonation. The origins of the term ground zero began with the Manhattan Project and the bombing of Japan.
Christmas at Ground Zero was created in 1986-11.
The duration of Hotel Ground Zero is 2700.0 seconds.
The duration of Countdown to Ground Zero is 1.5 hours.