Staff Sgt. Kevin Sumlin performs a pre-flight inspection on the landing gear of  a C-17 Globemaster III before a mission at Joint Base Charleston - Air Base Nov. 2.  Flying Crew Chiefs are trained in many specialized aircraft maintenance skills and provide universal support as the lone maintainer to fix most aircraft issues that may occur during a flying mission. Sumlin is a Flying Crew Chief with the 437th Aircraft Maintenance Squadron.  (U.S. Air Force photo/ Staff Sgt. Nicole Mickle)  