The conclusion of a difficult lawsuit by the International Center for 9/11 Studies against NIST (National Institute of Standards and Technology), Computer Security Division, resulted in NIST releasing more than 3 terabytes of photographs and video. The newly released media include coverage of the WTC collapse from the investigation conducted by NIST.
Among the video released were interviews of firefighters at the scene that were inside the buildings, who clearly confirmed hearing multiple explosions at the lobby level prior to the collapse of the north tower. These videos were not initially released after the 9/11 tragedy.
Additional testimony corroborates firefighters interview
The testimony of the firefighters is consistent with that of William Rodriguez, who first hand witnessed sub-level explosions that occurred before the impact of the first plane in the north tower.
Additional video includes a loud boom that can be heard just before the east penthouse of WTC 7 collapses. The building falls within its own footprint, strikingly similar to that of a demolition crew imploding a building. In several of the videos released by NIST, The International Center for 9/11 Studies claims deliberate editing was done by NIST to exclude key coverage of WTC 7 collapse as well as specific related audio.