Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. Our country appears to have once again been struck by an act of terrorism. The question tonight, from where . Four u. S. Marines are dead, gunned down by a lone shooter during a attacks on two u. S. Military facilities. The gunman identified at Mohammod Youssuf abdulazeez was also killed. The motive for the attacks unknown. The Justice Department only saying this is being investigated as an act of domestic terror. Lets get right to gabe gutierrez. Who leads our coverage from chattanooga, good evening. Reporter the fbi is on the scene taking the lead in the investigation. This is the building where the gunfire started and amazingly, everyone inside survived. Just a few miles away, the violence turned deadly. Terrifying moments today in chattanooga. There is a mass casualty. Reporter as a hail of bullets tore through two military centers. This woman heard it unfold. As soon as
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