Daymond John grew up during the 1980s in the heart of hip hop culture: Hollis, Queens. In his early 20s, he was working at Red Lobster and trying to figure out how to start a business. Eventually, he stumbled on the idea of making clothes for fans of rap music. In 1992, he started FUBU (For Us By Us) and began selling hats outside of a local mall. Three years later, FUBU was bringing in $350 million in sales. Today, he's a judge on Shark Tank, and a motivational speaker and author. Plus, for our postscript "How You Built That", how Len Testa created an app that uses real-time data to help people avoid long lines at theme parks.

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