A Firefighter from the Clark County Fire Department requests help for a Nellis Airman acting as a casualty during the 2012 Triennial Emergency Preparedness Exercise at McCarran International Airport Oct. 24, 2012, in Las Vegas, Nev. The simulated major accident provided a realistic scenario for first responders to use procedures and emergency equipment if an actual mishap occurred. Personal Injury (U.S. Air Force photo by Senior Airman Daniel Hughes)