Senior Airman Brandon Jadwin, 28th Aircraft Maintenance Squadron electrical and environmental technician, checks the inside of an access panel to inspect the integrated drive generator systems on a B-1 bomber at Ellsworth Air Force Base, S.D., April 4, 2013. Electrical environmental specialists have knowledge of electronic, mechanical and electrical principles relating to electrical and environmental systems, concepts and application of maintenance directives. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)