Airman 1st Class Tevin Duhart takes a sample of oil from an A-10 Thunderbolt II engine
U.S. Air Force Airman 1st Class Tevin Duhart takes a sample of oil from an A-10 Thunderbolt II engine during flight operations at Selfridge Air National Guard Base, Mich., on Aug. 10, 2012. Duhart is assigned to the 127th Aircraft Maintenance Squadron.