September 11, 2001 World Trade Center steel beams as thick as tank armor evaporate live as the building implodes upon itself.

On March 25, 2020, researchers at the University of Alaska Fairbanks issued the final report of a four-year computer modeling study on the collapse of World Trade Center Building 7. The 47-story WTC 7 was the third skyscraper to be completely destroyed on September 11, 2001, collapsing rapidly and symmetrically into its footprint at 5:20 PM.

Download it here: https://files.wtc7report.org/file/public-download/A-Structural-Reevaluation-of-the-Collapse-of-World-Trade-Center-7-March2020.pdf