Tucker Carlson: “According to the NIST report, thermal expansion of steel…”

“… were stretched to a breaking point by ongoing search and rescue missions, fire chiefs made the decision early on not to fight the fires that were burning in Building 7. According to the NIST report, thermal expansion of steel beams, not the complete melting of steel, caused the connections tying a crucial girder girder 2001 A to column 79, and that joint failed. The girder walked six and a quarter inches off its seat and that precipitated what is known as a Progressive collapse.” (07:31–07:46)

This is an excerpt from a raw transcript. The assertions have not been audited or verified. Tap the video to view the source footage and understand the context.