From left, Sgt. Chris Hagen, Command Sgt. Maj. Joseph Dallas and Staff Sgt. Nicholas Crosby prepare to use a chemical detection kit on detainees during Operation Southern Fist in the village of Obezhan Kalay, Spin Boldak district, Afghanistan, Sept. 29, 2012. The Afghan-led operation focused on denying the enemy freedom of maneuver and to connect local villagers with the Afghan government. The soldiers are part of the 2nd Infantry Division's 5th Battalion, 20th Infantry Regiment. The unit is from Joint Base Lewis-McChord, Wash.