WTC7, which was not struck by a plane and was only subject to office fires, went down like a kabuki drop. https://i.imgur.com/kob2Lz1.gifv

Official explanation (http://www.nist.gov/el/disasterstudies/wtc/faqs_wtc7.cfm)

    How did the fires cause WTC 7 to collapse?

    The heat from the uncontrolled fires caused steel floor beams and
    girders to thermally expand, leading to a chain of events that caused
    a key structural column to fail. The failure of this structural
    column then initiated a fire-induced progressive collapse of the
    entire building.

The acceleration of gravity in New York City is 32.159 ft/s2. WTC7 had 2.25 seconds of literal freefall, this is equivalent to approximately 8 stories of fall in which the falling section of the building encountered zero resistance. For any object to fall at gravitational acceleration, there can be nothing below it that would tend to impede its progress or offer any resistance. If there is anything below it that would tend to impede its progress or offer any resistance, then not all of the potential energy of the object would be converted to motion and so would not be found falling at gravitational acceleration (where did every single structural supporting columns go, instantly, at the exact same time?)

Just compare the collapse of WTC7 to these actual controlled demolitions [1] that cost a LOT of money to make sure the building drops in a controlled manner - because, in the real world, large steel frame buildings do not fall straight down without some careful planning [2].

1. https://www.youtube.com/watch?v=eem7d58gjno

2. https://www.youtube.com/watch?v=DDuUR7l3bgc

user:	rockboe
created:	April 27, 2015
karma:	8