I should have been in San Francisco for a conference that I went to every year around that time. I don't remember why I didn't go that year. Instead, I was walking across the street to do a radio interview about something related to Northwest Airlines. Our media relations person told me that somebody had flown a plane into the WTC and we joked about how it must have been some idiot in a Cessna buzzing the tower. By the time we got to the studio, the topic of the interview had changed...
Mike