John Cronin has never been one to let disability hold him back. The 22-year-old from Long Island, N.Y., was born with Down syndrome, a genetic disorder that causes developmental and intellectual delays. Motivated by his family’s love and encouragement, Cronin teamed up with his father 18 months ago to open a business. But not just any business. John’s Crazy Socks sells, you guessed it, socks. And as Faiza Elmasry reports, it’s a business worth $4 million. Faith Lapidus narrates.