Four years ago the Rana Plaza building collapsed and killed more than 1,100 garment workers in Bangladesh, sparking a global outcry for better working conditions and calling into question the values of the fashion industry. 

 Activists in 90 countries are marking the anniversary of the tragedy with a week of actions called Fashion Revolution. 

We talk about events planned in Chicago with Kelsey Timmerman, author of Where am I Wearing?: A Global Tour to the Countries, Factories, and People That Make Our Clothes.