What delayed people from leaving the Twin Towers*
Gathering personal items40 percent
Seeking out friend/co-worker33 percent
Searching for others26 percent
Phone calls18 percent
Shutting down computer8 percent
Waiting for direction7 percent
Gathering safety equipment5 percent
Changed shoes3 percent
Seeking permission to leave1 percent
*1,444 responses from occupants of World Trade Center towers who evacuated on Sept. 11.
SOURCE: DR. ROBYN GERSHON, MAILMAN SCHOOL OF PUBLIC HEALTH OF COLUMBIA UNIVERSITY.