http://www.theguardian.com/world/2008/sep/09/september11.usa
http://usatoday30.usatoday.com/news/sept11/2002-09-02-choices-usat_x.htm
http://survivingtimesoftrouble.com/httpritchieunlimitedpublications-commorganstanley/
Sites that students can research evacuation/ escape plans. What was supposed to happen, what did happen when people evacuated/ escape the twin towers.