Matthew Livelsberger, who has been identified as the sole occupant of the truck, was an active-duty Green Beret who served in the Army for 19 years. According to the Army, he had been a soldier ...

Lt. Col. Scott Mann is a retired Green Beret in the US Army as well as the president of MannUp Leadership Training. He some people sign up for the military for the wrong reasons. Produced by Eames ...