Robert and Beth Margalis joined a global pantheon of husband-and-wife open water swimming pairs who are successful nearly every time they hit the open water. Like Penny and Chris Palfrey, Angela Maurer and Nikolai Evseev, Nacho Grignaschi and Noelli Petti, Damian Blaum and Esther Nuñez, Pilar Geijo and Diego Tricárico, Mike and Cynthia Lewis, Sally […]