출연진
조 모턴
Narrator (voice)
Ruth Gruber
Self - Journalist
Charles Hendricks
Self - Military Historian
Heath Twichell
Self - Historian
William Griggs
Self - Army Engineer
Billy Connor
Self - Civil Engineer
Hayward Oubre
Self - Army Engineer
John Bollin
Self - Army Engineer
Henry Geyer
Self - Army Engineer
Fred Mims
Self - Quartermaster Corps
Alden Hacker
Self - Army Engineer
Bob Trail
Self - Canadian Resident
Alice Summer
Self - Canadian Resident
Alvin Schexnider
Self - Historian
Wallace Lytle
Self - Army Engineer
Bob Batey
Self - Army Engineer
Chester Russell
Self - Army Engineer