from Humans Are Free:
On September 11, 2001, at 5:20 p.m., World Trade Center Building 7 suddenly collapsed into its own footprint, falling at free fall speed for 2.5 seconds of its seven-second complete destruction. WTC 7 was not hit by a plane.
After it collapsed, Americans were told that office fires caused a unique — never before seen — complete architectural failure leading to the building collapsing into its own footprint at the rate of gravity.
For more than a decade, many Americans never even knew WTC 7 fell — up to and including the person who was Secretary of Defense when the towers came down, Donald Rumsfeld.