In 1904, the steamship General Slocum caught fire in the East River, killing 1,021 people on board. In 1911, the <answer>Triangle Shirtwaist Factory fire</answer>, the city's worst industrial disaster, took the lives of 146 garment workers and spurred the growth of the International Ladies' Garment Workers' Union and major improvements in factory safety standards.
A catastrophe in 1911 that killed 146 workers was called what?
Triangle Shirtwaist Factory fire