Another set of eyes
Staff Sgt. Jonathan Callahan, 374th Maintenance Group crew chief quality assurance inspector, speaks with Senior Airman Brandon Hughes, 374th Aircraft Maintenance Squadron aerospace maintenance journeyman, at Yokota Air Base, Japan, April 8, 2014. Members of quality assurance are chosen from within maintenance career fields to ensure that inspections are performed by subject matter experts. (U.S. Air Force photo by Airman 1st Class David Danford/Released)