Triangle Shirtwaist Factory interior, destroyed sewing machines, gutted by a fire that killed 146 on March 25, 1911. Managers locked fire exits to prevent thefts, trapping immigrant women workers.

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Triangle Shirtwaist Factory interior, destroyed sewing machines, gutted by a fire that killed 146 on March 25, 1911. Managers locked fire exits to prevent thefts, trapping immigrant women workers.