I'm recalling the thoughts running through my mind almost 10 years ago. I used to follow the stock market very closely and would spend mornings reading stories, blogs, etc., much of it coming from a NYC-based subscription site. One of the contributors was Bill "Bud" Mehan (sp?) whose company had just moved into the WTC a month or two earlier. I had chatted with him personally once or twice and felt he was a friend. He perished along with a thousand co-workers. The founded of the site, Todd Harrison, was updating the news as he heard it and the thoughts running through his mind up until the point he decided to evacuate (think he was a few blocks away). It was very eerie.
I never heard the story about Rick Rescorla until seeing a Yahoo story about it today. A family remembers: Hero of 9/11 gave life to save thousands - Yahoo! News
Here is a History Channel video on it:
9/11 Attacks Video — History.com
Wish his warnings had been listened to by more.