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New details on Dallas shooter
Dallas police Chief David Brown gave new details on what they are learning about the shooter. Then, NBC's Jacob Rascon talks about the security scare in Dallas Saturday night.
Tragedy in Dallas
Parkland student: Trump’s stance to arm teachers is ‘crazy’07:15
'One More Thing': Dallas takes a stand against the NRA01:21
'Old school' hack alarms Dallas alert system08:27
Police ambush killings on the rise04:09