Kirsten Potter, reader.

It lurks in the corner of our imagination, almost beyond our ability to see it: the possibility that a tear in the fabric of life could open up without warning, upending a house, a skyscraper, or a civilization. Today, nine out of ten Americans live in places at significant risk of earthquakes, hurricanes, tornadoes, terrorism, or other disasters. Tomorrow, some of us will have to make split-second choices to save ourselves and our families. How will we react? What will it feel like? Will we be heroes or victims? Will our upbringing, our gender, our personalityanything weve ever learned, thought, or dreamed ofultimately matter?