Paul Warambo holds up a used T-shirt for sale in Nairobi, Kenya. With the help of the internet, we found the original owner Gregory Warner/NPR hide caption

itoggle caption Gregory Warner/NPR

There are more than 4,000 garment factories in Bangladesh. One way or another, most of them trace their lineage to Abdul Majid Chowdhury, Noorul Quader and the 128 Bangladeshis who traveled to Korea 30 years ago. Kainaz Amaria/NPR hide caption

itoggle caption Kainaz Amaria/NPR