How did WTC 7 collapse if it wasn't a controlled demolition?

Was World Trade Centre 7 a controlled demolition? WTC 1 and 2 were hit each hit by an aeroplane, and they collapsed. However, WTC 7 was NOT hit by a plane and did NOT suffer major fires, and yet, incredibly, it collapsed neatly into its own footprint in 6.5 seconds. WTC 5 and 6, smaller buildings closer... show more Was World Trade Centre 7 a controlled demolition?

WTC 1 and 2 were hit each hit by an aeroplane, and they collapsed.

However, WTC 7 was NOT hit by a plane and did NOT suffer major fires, and yet, incredibly, it collapsed neatly into its own footprint in 6.5 seconds. WTC 5 and 6, smaller buildings closer to the twin towers were gutted by fire, but they did NOT collapse.

In 100 years of steel frame building construction, NO STEEL FRAME BUILDING HAS EVER COLLAPSED SOLELY DUE TO FIRE, even though many have burned MUCH HOTTER and FOR MUCH LONGER.

... Except, we are told, WTC 7.

Hence my question:

If WTC 7 wasn't a controlled demolition, then how did it collapse?

And if it was a controlled demolition, which the video footage looks exactly like, and Larry Silverstein the building owner implies on PBS television, then who expertly placed the explosives to implode this building?
Update: For anyone unfamiliar with WTC 7, a massive 47 storey steel-framed skyscraper which was NOT hit by a plane but also collapsed on September 11 2001, you could try the following links: http://wtc7.net/ http://911physics.co.nr/ (Click on WTC 7 link) http://www.prisonplanet.com/011904wtc7.html btw: the... show more For anyone unfamiliar with WTC 7, a massive 47 storey steel-framed skyscraper which was NOT hit by a plane but also collapsed on September 11 2001, you could try the following links:

http://wtc7.net/
http://911physics.co.nr/
(Click on WTC 7 link)
http://www.prisonplanet.com/011904wtc7.html

btw: the Silverstein group made nearly a $500 million profit just on this one building.
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