Sofia Shafquat

饰：Herself - Narrator

Jonathan Barnett

饰：Himself - Worcester Polytechnic Institute

Marvin Bush

饰：Himself - Principal, SECURACOM & STRATESEC

W. Gene Corley

饰：Himself - Structural Engineer

Thomas Eagar

饰：Himself

Frank W. Gayle

饰：Himself

Ramon Gilsanz

饰：Himself - Structural Engineer

James Glanz

饰：Himself - The New York Times

Joseph Casaliggi

饰：Self - Engine 7,(archive footage)

Paul Goldberger

Paul Goldberger

饰：Self - Architecture Critic

Steven E. Jones

饰：Self - Physics Professor, Brigham Young University,(archive footage) (as Steven Jones)

Leslie Robertson

饰：Self - WTC Structural Engineer (as Les Robertson)

亚历克斯·琼斯

Alex Jones

饰：Self,(archive sound)

Carol Marin

饰：Self - CBS News Reporter,(archive footage)

Stanley Praimnath

饰：Self - Survivor, 81st Floor - South Tower,(archive footage)

Larry Silverstein

Larry Silverstein

饰：Self - Leaseholder, World Trade Center,(archive footage)

Bart Voorsanger

饰：Self - Architect,(archive footage)