COMBAT OUTPOST OUELLETTE, Helmand province, Islamic Republic of Afghanistan - Lance Cpl. Brandon Chisholm tightens up a new track pad on an M-1A1 “Abrams” Main Battle Tank’s track. The Abbot, Maine, native is a tank operator with 1st Tank Battalion, 2nd Marine Division (Forward). Chisholm and his team of Marines work tirelessly to maintain their M-1A1 “Abrams” Main Battle Tanks.