On the morning of July 15, 2012, the weather at Sant'Agostino Beach in Italy was clear and calm--just perfect for a swim. Shortly before noon, however, the wind picked up. Soon, it blew so hard that it pushed two swimmers dangerously far from shore. Fortunately, a lifeguard was on duty. She managed to swim out and help bring both swimmers back. Most of the time, such an event wouldn't make headlines. This time, however, it did. That's because the...