The video shows perhaps the clearest view yet of World Trade Center 7 as it collapses directly into its own footprint at freefall gravitational speed in the late afternoon on September 11, 2001.
This collapse has long interested 9/11 researchers as the building was not struck by a plane and only had two isolated office fires burning in it that afternoon before its sudden and complete collapse, an unprecedented event in the history of modern steel-framed skyscrapers.
The video of the North Tower also shows an extremely detailed view of the bottom half of the building as the collapse reaches the lower levels, including a brief, clear glimpse of the 'spire' of interior columns before they disappear into the pyroclastic dust cloud at the base of the building, a feature not found in ordinary office collapses and also seen in the wake of the WTC7 collapse.
Both videos also show clear views of the blast squibs preceding the collapses, another sign of controlled demolition click here
