American Airlines Flight 77, piloted by Chuck Burlingame, was crashed into the Pentagon at 9:37am, exactly seven years ago. Last time I had a meeting there, I visited the memorial inside the Pentagon. It's a shame that the location makes it difficult to get to, because understatement is its strength. (I understand there's a more public landmark outside the building.) I came away with "rubbings" of the engraved names of my friends.
I wish I'd thought to bring that paper with me.