We had no idea what to do. We didn't even know which stairwell would take us all the way down and out of the building. We picked one, felt the door — it wasn't hot — then opened it. We saw people from the floors above already walking down. We got into the stairwell with them and started walking. It was a very eerie and somber experience. We were so scared. We had no idea what had happened or what was going on. The stairwell was dimly lit, and the dust particles made it difficult to breathe. I started coughing, and one of the men that I worked with gave me a handkerchief to cover my nose and mouth.