Sergeant Timothy Brookshire, a combat engineer serving with Engineers Platoon, 2nd Battalion, 9th Marine Regiment, provides security over watch as his Marines construct new fortified walls around the base’s perimeter here May 4, 2012. Combat engineers have torn down some of the fortified walls to shrink the base’s perimeter. The Marines plan to reduce their base’s guard posts in half by the end of their seven-month deployment. Brookshire is a Homer, Ga., native. - Sergeant Timothy Brookshire, a combat engineer serving with Engineers Platoon, 2nd Battalion, 9th Marine Regiment, provides security over watch as his Marines construct new fortified walls around the base’s perimeter here May 4, 2012. Combat engineers have torn down some of the fortified walls to shrink the base’s perimeter. The Marines plan to reduce their base’s guard posts in half by the end of their seven-month deployment. Brookshire is a Homer, Ga., native.