Title: The masked war
Subjects: International Association of Bridge and Structural Iron Workers, Structural and Ornamental Iron Workers International Association of Bridge, International Association of Bridge and Structural Ironworkers, International Association of Bridge, Structural, and Ornamental Iron Workers, Enquêtes criminelles, Sabotage, Criminal investigation
Places: United States, États-Unis
People: James B. McNamara (1882-1941), John Joseph McNamara, Ortie E. McManigal