Pfc. Chris Robertson and Lance Cpl. Douglas Quaderer return to their battalion's command post during exercise Atlas Hinge in Tunisia. Both Marines are motorcyclists in the 26th Marine Expeditionary Unit. The annual bilateral exercise, held Sept. 15-20 this year, involved about 1,500 U.S. Marines and 700 Tunisian service members. Photo by Sgt. Brook R. Kelsey, USMC. Pfc. Chris Robertson and Lance Cpl. Douglas Quaderer return to their battalion's command post during exercise Atlas Hinge in Tunisia. Both Marines are motorcyclists in the 26th Marine Expeditionary Unit. The annual bilateral exercise, held Sept. 15-20 this year, involved about 1,500 U.S. Marines and 700 Tunisian service members. Photo by Sgt. Brook R. Kelsey, USMC. SHARE: Download: Full Size (1.17 MB) Credit: VIRIN: 927021-Y-XOA39-880.jpg Photo Gallery