Mass shooting at Thousand Oaks bar leaves at least 12 dead

At least 12 people including a police officer were killed by a gunman who opened fire at Borderline Bar and Grill in Thousand Oaks, California, on Wednesday. Authorities said they are not naming the suspect, who had been killed, and do not know the motive or whether the incident is terrorism-related. NBC News national correspondent Miguel Almaguer reports for TODAY.