"Then people started jumping off."
A guy came running toward us who said another plane had crashed into the other tower, and now the sky was filling with a massive wall of black smoke and orange flames. Staring upward at the two majestic buildings, one had helpless thoughts about a helpless situation. It was so high up, there was no way to put water on these flames; it was just going to keep burning. Maybe it would just burn out the top of the building.
For awhile, aside from the flames and smoke, it was oddly uneventful. Sometimes windows would fall off the building and float down; sometimes a piece of smoking debris would arc downward. Then people started jumping off.
Find all of Daniel Henninger's account from September 12, 2001 here.