September 11th Memories

On September 11, 2001, our country experienced horrific terrorist attacks.  It was a frightening time in American history, with a lot of unknowns.  Most of us had no immediate connection with the victims, but the pain for those that lost loved ones in the Pentagon, the World Trade Center, and on Flight 93 was felt by the entire nation.
As we reach the 11th anniversary, think back to that day.  What do you remember?  Post a response by Friday, September 14th, for five bonus points.