Staff Sgt. Thomas Gillan, 28th Aircraft Maintenance Squadron electrical and environmental lead technician, inspects electrical systems on top of a B-1 bomber at Ellsworth Air Force Base, S.D., April 4, 2013. Aircraft electrical and environmental systems specialists are one of six specialties in the 28th AMXS specialist section responsible for making sure the many systems of the B-1s at Ellsworth function properly. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)