U.S. Air Force Senior Airman Kellyn Harris, 1st Maintenance Squadron non-destructive inspection journeyman, uses an eddy current kit at Langley Air Force Base, Va., Jan. 21, 2015. The eddy current kit is used to check for cracks on steel, aluminum and titanium parts. (U.S. Air Force photo by Airman 1st Class Breonna Veal/Released)