After almost 25 years now, there are more things we still can learn about that day. Silverstein had signed a 99-year lease for the World Trade Center complex just weeks before the attacks. Silverstein has stated that he typically attended meetings at the World Trade Center every morning. However, on 9/11, he did not go to the office due to a medical appointment. This detail has frequently resurfaced in documentaries, news reports, and online discussions as people revisit the events of that tragic day.
Everybody knew about it but us. Seems kind of interesting to me. This is like the enigma code. Whereas if you saved everybody the Germans figured out that their code was compromised. So you had to have some sacrificial lambs in order to keep it believable.
As I look deeper into it, I seen that there might have been warnings 2 hours before the attacks.