<human>:  What is the history of the Triangle Shirtwaist Factory fire?
<bot>: The Triangle Shirtwaist Factory fire of March 25, 1911, was one of the most devastating workplace fires in New York City's history. The fire killed 146 workers, mostly young immigrant women, who were employed in the factory that produced women's blouses. The tragedy served as a catalyst for the formation of a number of labor organizations, and generated outrage at the callousness and negligence of the factory owner and managers. In the aftermath of the tragedy, laws were passed to ensure better working conditions, the first of their kind in the United States. The historical significance of the fire remains today, as it stands as a reminder of the progress made in protecting workers' rights and safety.