Camp Lemonnier Fire and Emergency Services Firefighter Cristhain Carvajal, left, Crew Chief Washington Zabala and Firefighter Robinson Dayrit carry a simulated casualty to an ambulance during a mass casualty exercise on Camp Lemonnier, Djibouti. The exercise tested the ability of camp emergency and medical personnel to respond to a simulated chemical nerve agent attack. (U.S Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)