Steven Lopez: Tae Kwon Do
Hometown: Sugar Land, TX
Family biz: The three-time medalist heads to London with his sister, Diana, 28, also vying for gold in the sport, as well as brother Jean, 38 (his coach!), and Mark, 30 (his training partner!). "Tae kwon do is part of our lives," he explains. "It's what we do."