The Chechen story is central in the Hamburg Cell plot. Does it indicate the involvement of FSB in the 9/11?

AI Mode reply for The Chechen story is central in the Hamburg Cell plot. Does it indicate the involvement of FSB in the 9/11? Rather, historical evidence and official investigations show that the core members of the Hamburg cell—including Mohamed Atta, Marwan al-Shehhi, and Ziad Jarrah—were original