Sgt. Harris served in Afghanistan for several tours. He was awarded the Medal of Honor for saving a group of children, taking several bullets for them, and eventually losing a leg to protect them. He was still allowed into the Army, despite his condition. He and Sgt. Greene were the first two men into Lt. Hall's platoon, formed in 2006 in Germany. They'd stayed good friends and the two were often considered the "eyes and ears" of Lt. Hall.
Sgt. Harris was at Pratt-Whitney AFO, getting ready for the training exercize (As were all soldiers), when the Zero Heroes were called, leaving them to secure the base until they returned. Out of the 16 Zero Heroes, 6 returned to the base. All left the base to find thier families immediatley after landing.