Elenco (na ordem dos créditos)
Karim Arraki
SelfarchiveSound
Don Dahler
Self
Frank De Martini
Self - WTC Construction & Project ManagerarchiveFootage
Steve Evans
Self - BBC JournalistarchiveSound
Evan Fairbanks
Self - Freelance CameramanarchiveFootage
James Fetzer
Jim Friedl
Leslie M. Hazzard
Self - Boeing Representative
Joseph Keith
Self - Retired Aerospace Engineer & Ex Boeing EngineerarchiveSound
Jeff King
Stewart Nurick
Jennifer Oberstein
Dick Oliver
Bill Pitts
Self - NIST RepresentativearchiveSound
Theresa Renaud
Morgan Reynolds
Peter Jennings
Selfuncredited,archiveFootage
Rick Leventhal
Self - Fox News Reporteruncredited,archiveFootage
Mark Walsh
Self - Harley Shirt Guyuncredited,archiveFootage