Airmen assess an on-base crisis inside the emergency operations center during an operational readiness exercise March 9, 2011, Eielson Air Force Base, Alaska. The exercise is designed to test Airmen's ability and give Airmen experience in a simulated heightened threat environment while accomplishing the mission. The EOC receives and distributes information between base personnel during emergencies. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)