How much did Orlando shooter’s wife know before mass shooting?

03:00

Omar Mateen’s wife told officials she knew about her husband’s plan to attack a gay nightclub in Orlando, Florida, and authorities say that she had even driven him by the club at least once to scout the scene. NBC’s Stephanie Gosk reports for TODAY on how Mateen’s wife, Noor Zahi Salman, claims she tried to talk her spouse out of the attack, but didn’t warn police. (Run time: 3:00)