Lance Cpl. Dylan S. Melancon, left, an airframe mechanic

Lance Cpl. Dylan S. Melancon, left, an airframe mechanic with Marine Heavy Helicopter Squadron 361 and a Breaux Bridge, La., native, works with Lance Cpl. Derek J. Arnold, right, a fellow airframe mechanic with HMH-361 and a Seattle native, to close a tool box after an accountability check aboard Marine Corps Air Station Miramar, Calif., Sept. 13. An all tools accounted for check, also known as an ATF, is performed at the beginning and end of each work day by all maintenance crew members.