Master Sgt. Charles Ramirez and Tech. Sgt. Eric Garza, nondestructive inspection technicians, inspect an F-16D Fighting Falcon's longeron in the aircraft’s canopy sill at Luke Air Force Base, Ariz., April 12, 2016. Ramirez and Garza are members of the Texas Air National Guard’s 149th Fighter Wing, headquartered at Joint Base San Antonio-Lackland, Texas. (U.S. Air National Guard photo by 2nd Lt. Phil Fountain)