I was putting a contract together for some steel purchases when one of the people who worked for me ran into my office and said to get on CNN on the computor. Saw the second plane hit.
We had people at a customer's power plant in Massachusets. Took them a week to get back. Another guy I knew was at a sales meeting in LA. They could not rent a car, none left. Three of them bought a Caddy off a used car lot with an AMEX and drove it back to Massachusets. Sold it, paid off American Express and the expense account was happy.
I will say that contract did not get finished that day, and not a drop of other work got done.