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"The Cost of September 11." The Cost of September 11. N.p., n.d. Web. 06 May 2015. http://www.iags.org/costof911.html
Clark, Brian. "A Twin Towers' Survivor Story." PBS. PBS, 30 Apr. 2002. Web. 06 May 2015. http://www.pbs.org/wgbh/nova/tech/twin-towers-survivor-story.html
"Flight Path Study – American Airlines Flight 11" (PDF). National Transportation Safety Board. February 19, 2002.
"Flight Path Study – United Airlines Flight 175" (PDF). National Transportation Safety Board.
CNN. Cable News Network, n.d. Web. 06 May 2015.http://edition.cnn.com/SPECIALS/2002/america.remembers/stories/heroes/welles.html
"USATODAY.com - Desperation Forced a Horrific Decision." USATODAY.com - Desperation Forced a Horrific Decision. N.p., 02 Sept. 2002. Web. 06 May 2015. http://usatoday30.usatoday.com/news/sept11/2002-09-02-jumper_x.htm