As the steel columns at the core of the Twin Towers collapsed, the floors they supported fell on each other like two stacks of pancakes.(National Geographic, 2001). Like it was falsely reporting that Iraq had weapons of mass destruction, Iraq and al Qaeda worked together to do 9/11, and many other falsehoods.
The National Institute of Standards & Technology (NIST), which was bossed by the Bush II Regime at that time, did not subscribe to that false theory advanced by Murdock's Fox News outlet:
NIST’s findings do not support the “pancake theory” of collapse, which is premised on a progressive failure of the floor systems in the WTC towers (the composite floor system — that connected the core columns and the perimeter columns — consisted of a grid of steel “trusses” integrated with a concrete slab ... the floors did not fail progressively to cause a pancaking phenomenon.(NIST, 2006). But you never heard that probably, because the Fox News Empire does not apologize for its falsehoods; their motto is Cheney's motto: "never apologize".
More often than not they instead make up another falsehood to wrap around it, you know, the onion technique. That is why all neoCons, together with most other people who do not do their homework, still believe the "pancake theory" falsehood.
But some do apologize for their 9/11 mistakes. Van Jones, who used to work for the Obama Administration, apologized for signing a petition requesting a new investigation of 9/11 because he did not believe that The 9/11 Commission did an adequate job.
Fox News complained about his "9/11 wrong", never mentioning theirs, and for that Van Jones lost his job while Fox News got a pat on the back by the "birthers".