"Inside, Kelly Badillo, an elevator operator, was in the lobby when he heard the first explosion. “I felt the pressure, like somebody had grabbed me and squeezed me and then let go,” he said. Then came the second explosion. “It went boom. Boom boom boom. Then you couldn’t breathe. You couldn’t see your fingers in front of you. I turned on my flashlight just to look at my hands. Everybody was just standing there.”"
"There were reports of an explosion right before the tower fell, then a strange sucking sound, and "finally the sound of floors collapsing. Then came a huge surge of air, followed by a vast cloud of dirt, smoke, dust, paper and debris. Windows shattered. People screamed and dived for cover."
https://www.latimes.com/travel/la-xpm-2001-sep-12-na-sept-11-attack-201105-01-story.html
https://www.latimes.com/nation/911-archive-baum-scene-20010912-story.html
https://news.climate.columbia.edu/2021/09/08/a-morning-that-shook-the-world/
https://www.wsj.com/public/resources/documents/wsj-paper-09122001.pdf
