'Tipping point' on gun violence prompts U.S. CEOs to action

On Thursday, a number of American business leaders joined the clamor of voices demanding meaningful legislation to reduce gun violence. CEOs from 145 major U.S. companies sent a letter to senators urging them to expand background checks and implement a “red flag” law. William Brangham talks to Richard Edelman, CEO of the public relations and communications firm Edelman, who signed it.