Here's another weird one. One of the 9/11 hijackers [1] checked into a Florida hospital with apparent cutaneous Anthrax symptoms. After investigation of this incident, the FBI officially ruled out a link between 9/11 and the 2001 Anthrax attacks [2]. The main suspect in the Anthrax attacks, Bruce Ivins, committed suicide. A lot of unknowns remain and I'm still not sure if I believe the official FBI story about Ivins.
[1] https://en.wikipedia.org/wiki/Ahmed_al-Haznawi
[2] https://www.theguardian.com/world/2002/mar/24/terrorism.anth...