Do shark bracelets really reduce the risk of shark attacks?

There has been a lot of talk lately about shark activity off California’s Coast. In fact, there’s a juvenile shark nesting spot within a mile of Padaro Beach in Carpinteria. So, how can surfers, swimmers, divers and paddle boarders stay safe in increasingly sharky waters? A Santa Barbara entrepreneur says he’s developed a product to do just that, but some scientists question the testing.