U.S Air Force Senior Airman Rickey Godette, 1st Maintenance Squadron Nondestructive Inspection journeyman, prepares aircraft oil to be analyzed at Joint Base Langley-Eustis, Va., Dec. 5, 2016. NDI individuals use this test as a way to track any discrepancies within the oil. (U.S. Air Force photo by Senior Airman Kimberly Nagle)