Do you also remember the idea was to land helicopters on the roof to whisk passengers to JFK airport. I seem to remember one of them lost a rotor and the practice was stopped.
That was New York airways which flew from JFK, LaGuardia, roof of Pan Am Bldg. and Newark airport.
I flew it a number of times and landed on top of the Pan Am Bldg. to do business in the WTC.
I was scheduled to fly it the day it crashed on the Pan Am Bldg. but was delayed and I missed the flight.
Did not know anything about it until the next morning when I read about it in the paper and made a hasty phone call to my wife and work that I was alive and well.