Will Omar Mateen’s wife be charged for not warning police of Orlando attack?

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More details are surfacing about Omar Mateen’s wife, and her knowledge of her husband’s intention to kill patrons of an Orlando gay nightclub in a mass shooting ahead of the attack. NBC’s Pete Williams reports for TODAY on why Noor Zahi Salman says she didn’t go to authorities to warn them about the imminent attack, and whether she is likely to face charges. (Run time: 2:59)