U.S. Army Staff Sgt. Carlos Gonzales and Sgt. Ernesto Gallegos assist pilots during a run up of a CH-47F Chinook helicopter on Camp Marmal, Afghanistan, Feb. 16, 2012. Gonzales is a flight engineer instructor and Gallegos is a crew chief. Both are assigned to the 1st Cavalry Division's Company B, 1st Air Cavalry Brigade, Task Force Lobos.