Students from the U.S. Air Force Expeditionary Center at Joint Base McGuire-Dix-Lakehurst, N.J., perform combat first aid on a simulated casualty while Chief Master Sgt. Robert Tappana, Air Education and Training Command command chief master sergeant looks on with other members of EC leadership June 16. Chief Tappana visited the Expeditionary Center to get a first-hand look at how the organization conducts pre-deployment training for Airmen preparing to deploy to support ongoing expeditionary operations. (U.S. Air Force photo by Carlos Cintron/Released)