Chief Gas Turbine System Technician (Mechanical) Rafael Santillan, leading chief and an instructor at the Gas Turbine Strand Accessions School on Naval Station Great Lakes, explains a ship engine control board to Navy Junior ROTC cadets. More than 120 cadets, from NJROTC Area 3 units across seven Midwest states, attended the 2014 NJROTC Leadership Academy June 14-21. (U.S. Navy photo by Scott A. Thornbloom/Released)