A group of crew chiefs from the 127th Aircraft Maintenance Squadron confer during pre-flight preparations for several A-10 Thunderbolt II aircraft at Selfridge Air National Guard Base, Mich., March 21, 2012. The aircraft are flown by the pilots of the 107th Fighter Squadron. One of the oldest flying units in the military, the 107th FS will turn 95 years old this summer. Photo by Master Sgt. Terry Atwell.