Emergency responders from the McDonald Army Health Center Installation Support Team and Sentara Norfolk General Hospital simulate transporting a patient to a medical evacuation helicopter during a full-scale helicopter crash exercise at Fort Eustis, Va., March 13, 2015. As part of the exercise, the medical helicopter was called in from the 733rd Civil Engineer Division Fire Department to assist them with a simulated critical patient. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)