This summer, city drones are spotting more sharks off Rockaway and other beaches, prompting multiple temporary closures and stirring unease among beachgoers. WNYC’s Liam Quigley explains what’s driving the uptick in sightings. Also, New York Aquarium curator and marine biologist Hans Walters talks about shark behavior, the kinds of sharks near New York, and busts some of the biggest myths about these ocean predators.