Tae Kwon Do
From left: Mark Lopez, Diana Lopez, Steven Lopez
You could say that Mark, Diana and Steven Lopez have tae kwon do in their blood—the siblings each won a medal in the 2008 Olympic Games! Steven won gold in the 2000 and 2004 Olympic Games, but Beijing was a family affair. Mark won the silver medal, while Steven and Diana earned bronze. They are the first set of three U.S. siblings to compete in a Summer Olympic Games since 1904.