Spc. Kyle Gray Staff (left) and Sgt. Luke Johnson (right), explosive ordnance disposal specialists, 748th Ordnance Company, 242nd Explosive Ordnance Disposal Battalion, 71st Ordnance Group, disassemble and reassemble an M4 carbine in the Steadfast and Loyal Pentathlon during Iron Horse Week, Jan. 26, 2015. Teams ran a lap on the track, carried heavy water jugs for 100 meters, tied a tactical knot, disassembled and reassembled an M4 carbine and ran a final lap in the fastest time possible.