On a windy morning in April 2005, two friends set out to go fishing near Charleston, South Carolina. The teenagers paddled their small 15-foot (5.6 m) boat into the choppy Atlantic Ocean. They planned to stay close to shore and fish. Suddenly, their boat became caught in a powerful rip current. It began to sweep the small vessel away from shore. The frightened teenagers tried paddling back to land with all their might, but the current was too strong...