I'm here to meet some of South Korea's toughest women holding on to a way of life that goes back generations. These guys here, these are the legendary free divers of South Korea. They're known as the Heno, which translates literally as sea women.And when they dive, they don't use any oxygen, just a single breath that takes them down to the sea floor where they collect up seafood to be sold at the market. These women free dive for up to 6 hours a day through harsh winters, even through pregnancy. It's a prac ...