Manifesto posted by man claiming responsibility for New Zealand shooting reveals alleged motive

A 74-page racist manifesto was posted online the same day by a man who said he was behind the mosque attacks in New Zealand. CBS News has not been able to confirm if it was posted by the suspected shooter. But it lays out the alleged motive, citing anti-immigrant sentiment and revenge for past terror attacks in Europe. At least 49 people were killed Friday. Nikki Battiste reports.