That's the brakes!
                Airman 1st Class Nicole Furwa installs landing gear brakes on an F-16 Fighting Falcon March 10 at Lackland Air Force Base, Texas. She is assigned to the 149th Maintenance Squadron which is part of the Texas Air National Guard's 149th Fighter Wing, an F-16 training unit. (U. S. Air Force photo/Robbin Cresswell) 
                
                    
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