National Public Radio: RACHEL MARTIN, HOST: Hurricane Sandy destroyed a lot of homes and businesses in 2012. But it also ruined crucial natural habitats - in particular, two freshwater ponds in New York City that migratory birds depend on. Now the National Park Service is working together with conservation organizations and volunteers to fix the damage. Eilis O'Neill brings us this story from New York. EMILY NOBEL MAXWELL: When Hurricane Sandy hit, a lot of salty water inundated this site. EILIS O'NEILL, BYLINE: This...