Lance Cpl. Christopher J. Rieger, left, provides security

Lance Cpl. Christopher J. Rieger, left, provides security as his fellow Marines call in a simulated casualty evacuation June 24 during Exercise Coral Thunder at Kadena Air Base. Remaining alert while providing security ensured the mock casualty was safely evacuated from the potentially dangerous situation. Rieger is a Butler, Pennsylvania, native and refrigeration and air conditioning technician with Marine Air Support Squadron 2, Marine Air Control Group 18, 1st Marine Aircraft Wing, III Marine Expeditionary Force.