Big news. For the first time in SI's 62-year history, swimsuit models are in a regular issue. Hailey Clauson and Nina Agdal appear in this week's magazine as part of SI's Summer of Swim series. But that's not all. There will be a gaggle of models in Coney Island on Aug. 28 for SI's first Summer of Swim Fan Festival, which is FREE and open to the public. Then at night, Action Bronson will perform at the new Coney Island Amphitheater (buy your tickets now!).