Today marks the 100-year anniversary of the Triangle Shirtwaist Factory fire, New York’s landmark industrial disaster that killed 146 out of 500 employees, most of them young immigrant women and girls. The tragedy sparked a nationwide debate about workers rights, representation and above all health and safety at the work site.

Today we honor the those 146 workers who lost their lives on the job by joining the nationwide moment of silence at 4:25 p.m., when the fire broke out in 1911 at the factory.