Alex Jones
(Self),
Joe Casaliggi
(Self - Engine 7),
Brian Clark
(Self - Volunteer Fire Marshall),
W. Gene Corley
(Self - Structural Engineer),
Marvin Bush
(Self - Principal, SECURACOM & STRATESEC),
Paul Goldberger
(Self - Architecture Critic),
Steven E. Jones
(Self - Physics Professor, Brigham Young University),
Sofia Shafquat
(Narrator),
Jonathan Barnett
(Self - Worcester Polytechnic Institute),
Pat Dawson
(Self),
Frank De Martini
(Self - Manager, WTC Construction & Project Management),
Christopher Hanley
(Self),
Thomas Eagar
(Self),
James Glanz
(Self - The New York Times),
Scott Forbes
(Self - Senior Database Administrator, Fiduciary Trust),
Eric Hufschmid
(Self - Metal-Cutting Expert & Author),
Ramon Gilsanz
(Self - Structural Engineer),
Frank W. Gayle
(Self)