军用背包厂家US Army (USA) Sergeant (SGT) Richard Mercado, 3rd Brigade, 2nd Infantry Division (ID), weighs in at McChord Air Force Base’s (AFB), Washington (WA), troop holding area as they prepare to deploy in support of Operation IRAQI FREEDOM. The overall weight of the troops determines the seating arrangement to maintain balance of the aircraft when loaded with personnel and cargo.