U.S. Service members with the Chemical, Biological, Radiological, Nuclear and High-Yield Explosive Enhanced Response Force Package (CERFP), Oregon National Guard and the CERFP, Hawaii National Guard pose for a photo March 30, 2014, during Vigilant Guard-Alaska 2014 as part of Ardent Sentry 2014 near 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.