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Shortly before 5:00 pm on March 25, 1911, the approximately 500 people working at the Triangle Shirtwaist Factory on the 8th, 9th, and 10th floors of the Asch Building were preparing for their shifts to end. They worked in cramped, dirty, and unsafe conditions, sewing the shirtwaist, a popular blouse of the time. But when a fire erupted—probably the result of smoking—it took less than 20 minutes for 146 people, most of them young women,...