THis JUST IN: 9/11 3rd tower mystery 'solved'!

Building 7 is the smoking gun in BBC's "The Third Tower"

The 47-storey third tower, known as Tower Seven, collapsed seven hours after the twin towers.

Investigators are expected to say ordinary fires on several different floors caused the collapse.

Conspiracy theorists have argued that the third tower was brought down in a controlled demolition.

Unlike the twin towers, Tower Seven was not hit by a plane.

The National Institute of Standards and Technology, based near Washington DC, is expected to conclude in its long-awaited report this month that ordinary fires caused the building to collapse.

That would make it the first and only steel skyscraper in the world to collapse because of fire.

WTC 7 - Leaked NIST Docs: "Unusual" Event Before Collapse

Leaked confidential NIST documents concerning the investigation into the collapse of WTC 7, the 47-storey skyscraper that was not hit by a plane but imploded in under seven seconds on 9/11, reveal that an "unusual" event preceded the collapse of the building - a "jet of flames" that shot out of several windows after most of the fire had already died down.

The documents - entitled Confidential and Predecisonal Document NIST Report on Building 7 - form the preamble for a long-awaited final verdict on what caused a structurally reinforced building to fall like a controlled demolition despite suffering relatively minimal fire damage.

Chapter 1: WTC 7 Visual Evidence, Damage Estimates, and Timeline Analysis (William Pitts) is a thorough analysis of window fires by video and picture evidence, which concludes that all major fires before floors 7 and 13 died out prior to collapse.

The report states, "At 4:38 p.m. all of the windows between 13-44A and 13-47C were open, and the fires responsible for opening the windows had died down to the point where they could no longer be observed."

"Just prior to the collapse of the building at 5:20:52 p.m. a jet of flames was pushed from windows in the same area. The event that caused this unusual behavior has not been identified."

What could have caused this "jet of flames" to shoot out of windows immediately prior to the collapse of the building? The decompression force of a series of explosives or an incendiary device?

The leaked documents precede a BBC hit piece documentary which airs on July 6th and is set to claim that WTC 7 was the first steel-framed building in history to suffer a complete collapse from fire damage alone - a scientific impossibility.