LANGLEY AIR FORCE BASE, Va.-- Airman First Class Danna Osgood, 1st Equipment Maintenance Squadron Non-Destructive Inspection apprentice, rinses a F-15C Eagle bell house hydraulic component in preparation for inspection March 22. NDI inspects for cracks and flaws on aircraft and their components, aerospace ground equipment, safety equipment and also tests jet engine oil samples, using a variety of methods, like magnetic particle, fluorescent penetrant, eddy current, radiography, optical and ultrasonic equipment. (U.S. Air Force photo/ Senior Airman Dana Hill)