U.S. Air Force Staff Sgt. Jason Adrian, with the 60th Medical Group, checks the status of a simulated natural disaster casualty March 31, 2014, during an evacuation drill as part of a mission assurance exercise during Ardent Sentry 2014 at Joint Base Elmendorf-Richardson, Alaska. Ardent Sentry is a NORAD and U.S. Northern Command (USNORTHCOM)-directed exercise focusing on defense support of civil authorities in response to simulated weather, security and disaster contingencies. While Ardent Sentry is primarily a command post exercise, several field training events were conducted at various locations within the USNORTHCOM area of responsibility.