Jin Sook Chang came to the U.S. in 1981 and worked as a hairdresser to make ends meet. In 1984, she and her husband Do Won used $11,000 in savings to open a 900 sq-foot clothing store in Los Angeles, initially called Fashion 21. Forever 21 is now a $4 billion teen retailer and employs 43,000 people in 800 stores across 48 countries