U.S. Air Force Master Sgt. Jason Phelps, Mobility Air Force Maintenance Supervisor and Production Course student, tracks aircraft as a flight chief during a capstone training event, March 27, 2019, at the U.S. Air Force Expeditionary Operations School (EOS). The capstone training event gives each student practice in a variety of duty positions related to managing personnel and aircraft on a flight line. The EOS, part of the U.S. Air Force Expeditionary Center, is located at Joint Base McGuire-Dix-Lakehurst, New Jersey. (U.S. Air Force photo by Tech. Sgt. Ashley Hyatt)