Book Excerpt: 'The Unthinkable: Who Survives When Disaster Strikes -- and Why'

Jan. 19, 2009— -- The publisher provided the following excerpt of "The Unthinkable: Who Survives When Disaster Strikes -- and Why" to ABC News. Click here for more information on this book.

Delay: Procrastinating in Tower 1

On February 26, 1993, when terrorists attacked the World Trade Center for the first time, Elia Zedeno was in an express elevator carrying a slice of Sbarro's pizza. She had taken a new temporary worker to the food court to show him around, and they were on their way back to their desks. When the bomb exploded, they heard a loud pop and the elevator stopped and began to descend. Then it stopped for good, trapping her and five other people. Smoke began to slowly coil in from below. Two men grappled with the door. A woman dropped to her knees and started praying, making Zedeno nervous. Then one of the men calmly directed everyone to get low and cover their faces. They all did as they were told.

Zedeno concentrated on keeping her breathing shallow and slow. But the more she tried to calm down, the harder her heart seemed to pound. Then they heard a man screaming in the elevator next to them. "I'm burning up!" he yelled as he banged on the metal box around him. But soon he was quiet. "I remember thinking, 'We're going to be next,'" Zedeno says. She visualized rescue workers finding them dead inside the elevator later. Just then, she thought she would lunge for the doors and start banging herself. But before she could, the temp had started doing it for her. He was screaming and banging. So Zedeno took charge of quieting him down. "Robert, calm down. You're going to inhale too much smoke," she told him. He started to cough and returned to the floor.

It was around then that Zedeno was filled with a wave of peace, inexplicably.

"Regardless of the outcome, I knew everything was going to be OK," she remembers. "My breath became effortless. My mind no longer wandered. Suddenly, I wasn't there anymore. I was just watching. I could see the people lying in the elevator. The sounds were far away, and I was just hovering. I had no emotions."

When they'd been in the elevator for about an hour, a firefighter managed to rip open the door and pull them out. It turned out the car had returned to the lobby level, and that's where they'd been all along. Zedeno could not see the face of the firefighter who pulled her out; the smoke was too thick. She did as he instructed, grabbing onto a rope and following it out through the lobby and out the doors. She was stunned by the darkness in the lobby and the emptiness outside. She thought that once she had made it out of her own private catastrophe, everything would be normal, bustling and bright. She never imagined that a place could look so different.

In the basement below, a Ryder truck full of eleven hundred pounds of explosives had left a crater five stories deep. Six people had died. It was the largest full-building evacuation in U.S. history, and nothing had gone the way it was supposed to go. Smoke purled up the stairways. The power failed, rendering the emergency communications system useless and the stairways dark. People moved extraordinarily slowly. Ten hours after the explosion, firefighters were still finding people who had not yet evacuated in their offices.

After the bombing, glow-in-the-dark tape and backup power generators were installed in the Trade Center. Both helped save lives eight years later. But still no one fully answered the fundamental question: why did people move so slowly? And what did it mean about all of our assumptions about skyscrapers -- and the Trade Center in particular? The 1993 bombing became a story about terrorism, as would the attacks on the same buildings eight years later, and rightly so. But they were also stories of procrastination and denial, the first phase of the human disaster experience.

A few days later, Zedeno was right back at work in a neighboring building. One month later, her office reopened on the seventy-third floor of Tower 1. She started riding the same elevator to work. But it was months before she could get the taste of soot out of her mouth. She thought about leaving the towers, but not with any conviction. "I remember saying, 'This could happen again.' And someone said, 'Lightning never strikes twice.'"