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January 16, 2014- By Steven E. Greer
The videos below are as if the viewer is walking north, entering WTC Tower 4 at the southeast corner on Chruch Street (The street on the right is Church looking north). Then, the viewer walks northward, underground, into WTC Tower 3, then into the giant fish-bones-looking oval hub.
In the first video, below, the tour stays at the highest level of the concourse.
In this video, the tour goes one level below ground.