Boeing CEO on deadly crashes: "Not our job" to assign fault

In an exclusive interview with incoming "CBS Evening News" anchor Norah O'Donnell, Boeing's CEO admits a software mistake on its 737 Max aircraft caused two deadly plane crashes in less than five months. More than 300 people died in those accidents. In this excerpt of O’Donnell's interview, Boeing CEO Dennis Muilenburg says its not his company's job to point fingers or assign blame.