. >> reporter: 31-year-old janelle guzman had taken a job with the port authority, located on the 64thf the north tower. >> i did not know what was going on. we made a couple of phone calls and they told us, it's okay, just stay. >> reporter: meanwhile, on the streets of downtown new york, there is pandemonium and chaos. >> i hear another plane, and i happen to look up. >> we hear just this giant explosion. flight 175 going into the south tower. >> reporter: having seen both planes slam into the towers, judy knew the extent of the inferno on the upper floors. >> we're telling the security of that building, you have to evacuate. you just got hit, another plane just hit this building. >> reporter: as smoke begins to engulf the floor, janelle and some of her co-workers finally decide to get out of the north tower. >> we were going down, and we would come to the staircase holding hands. i think where we mid it to the 30-something staircase, there were firefighters coming up. i felt, good, okay, they're coming up, we're going down, we're going to make it, it's not that bad. >> reporter: as