Transcript for US top general back on streets after deadly attack in Afghanistan

Commander. A clearer portrait now emerging after a deadly attack in Afghanistan. The commander of U.S. And nato forces, general Scott Miller, was forced to draw his weapon. Martha Raddatz and what she's learned tonight. Reporter: This is general Scott Miller with officials discussing the upcoming election. We know there is going to be some violence, but I am very confident your forces are going to be prepared for this election. Reporter: Later, the group moved outside to await Miller's helicopter, and a man in an Afghan uniform opened fire on the group with an automatic weapon. That's when general Miller pulled out his own 9 millimeter pistol, and other Americans and Afghans drew their weapons, too. The gunman was quickly shot dead, but he left a trail of carnage. The kandahar police chief, seen here at the meeting, was killed, as well as a kandahar intelligence official. The local governor wounded, with two Americans, and a contractor working for the U.S. Government. Today, the general back on the streets of Afghanistan. In this 17-year war, this appears to be the closest a commanding officer has come to being harmed. Do they know Miller was the target? U.S. Officials believe kandahar was the target, but the gunman is dead. So we may never know. Martha, thank you. Back at home, and the new headline in Robert Mueller's investigation.

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