"I don't think anybody could have predicted that these people would take an airplane and slam it into the World Trade Center, take another one and slam it into the Pentagon....." - Condoleezza Rice, National Security Adviser (CNN)

During October 24-26 of 2000 in another 9/11 coincidence the Pentagon was having drills of a commercial aircraft crashing into the building. 10 1/2 months later it happened.

"The fire and smoke from the downed passenger aircraft billows from the Pentagon courtyard. Defense Protective Services Police seal the crash sight. Army medics, nurses and doctors scramble to organize aid. An Arlington Fire Department chief dispatches his equipment to the affected areas." (Source)