(Credit: Screengrab) The Pentagon is launching an investigation into a video that seemed to show an American soldier firing his gun into an Afghanistan truck. The 3-minute, 9-second video in question showed American troops wearing uniforms, which suggested they were part of U.S. special operations. Twenty seconds into the footage, a military armored vehicle could be seen approaching a truck. A soldier is seen firing a military-style shotgun into the driver-side window of the truck, shattering the glass in the process. “The amateur video posted on a public website gives us serious concern.