Shark sightings in Orange County; warnings in Southern California

A 4 km stretch of an Orange County shoreline has been closed after several large sharks were spotted. With summer approaching there are new warnings that Southern California beaches may be seeing more sharks too. Weather shifts are drawing more of the underwater predators to parts of California. And now one team of researchers is trying to develop a better warning system – so beachgoers are able to get out of the water, before it’s too late. Aarti Pole reports.