Gov. Sean Parnell of Alaska, left foreground, visits the Palmer Fairgrounds in Palmer, Alaska, March 28, 2014, 50 years after the Great Alaska earthquake of 1964, to observe an Alaska National Guard medical detachment and the Alaska Department of Health and other organizations provide medical aid to more than 75 simulated injured citizens during exercise Ardent Sentry 2014. 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.