It’s not a flat out lie. At worst you’d say “half true”
If you try and search the web on this you’ll be using wiki/snopes etc. as sources and you’re not in good company there.
Why dont you get the book mentioned if it’s available to you and not me?
You are getting closer to “CIA connections” (the book available to all here):
https://www.amazon.com/Visas-Al-Qaeda-Handouts-Insiders/dp/0990926206
(Please tell me that you are not going down the THC-fueled paranoia/conspiracy minded Libertarian “911 was an inside job” road!!)(Jet fuel fires do soften steel beam hangars)(Those FR threads have been done ad nauseam!).