My most vivid memory related to September 11, 2001 happened not on the day the towers fell, but a few days later. My wife and I were in Venice during the attack, and of course we were stranded there. (Lovely place to be stranded.) The Italians had organized a moment of silence out of respect for the victims of the terrorists. As we walked near the Ponte di Rialto, an area filled with tiny shops, the shopkeepers all stepped out of their shops and observed three minutes of silent solidarity with the United States.
The only sound was a hundred variations on “Excuse me, excuse me! How much does this cost?” spoken by oblivious American tourists.