Secretary of the Air Force Michael Donley addresses attendees to the Air National Guard Commander's Development Course class March 29, 2012 at the ANG Readiness Center, Joint Base Andrews, Md.

Secretary of the Air Force Michael Donley addresses attendees to the Air National Guard Commander's Development Course class March 29, 2012 at the ANG Readiness Center, Joint Base Andrews, Md. (National Guard photo by Master Sgt Marvin Preston/RELEASED)

Secretary of the Air Force Michael Donley addresses attendees to the Air National Guard Commander's Development Course class March 29, 2012 at the ANG Readiness Center, Joint Base Andrews, Md.

Secretary of the Air Force Michael Donley addresses attendees to the Air National Guard Commander's Development Course class March 29, 2012 at the ANG Readiness Center, Joint Base Andrews, Md. (National Guard photo by Master Sgt Marvin Preston/RELEASED)

Gov. Dave Heineman, governor of Nebraska, addresses attendees of the 2012 Domestic Preparedness Workshop, near Washington, D.C., on Feb. 24, 2012.

Gov. Dave Heineman, governor of Nebraska, addresses attendees of the 2012 Domestic Preparedness Workshop, near Washington, D.C., on Feb. 24, 2012. Heineman talked about the Unity of Effort, an initiative that solidifies the Guard's role in responding to emergencies and disaster situations. (Army National Guard photo by Sgt. 1st Class Jon Soucy)

The eight National Guard members selected to have dinner with the Obamas at the White House, gather after a pre-briefing Feb. 29, 2012 in Arlington, Va.

The eight National Guard members selected to have dinner with the Obamas at the White House, gather after a pre-briefing Feb. 29, 2012 in Arlington, Va. The Obamas are paying tribute to all veterans of the Iraq War, and service members representing the 54 states, territories and the District of Columbia were chosen to attend a dinner in their honor. (Army National Guard photo by Sgt. Darron Salzer)

General Craig R. McKinley, chief of the National Guard Bureau greets students from across the country before the start of the 2012 National Guard Youth Challenge Gala, Washington, DC on 28 February 2012.

General Craig R. McKinley, chief of the National Guard Bureau greets students from across the country before the start of the 2012 National Guard Youth Challenge Gala, Washington, DC on 28 February 2012. (National Guard photo by MSgt Marvin R. Preston)

Lieutenant General (Ret) John B. Conaway, former chief of the National Guard Bureau addresses students from across the country before the start of the 2012 National Guard Youth Challenge Gala, Washington, DC on 28 February 2012.

Lieutenant General (Ret) John B. Conaway, former chief of the National Guard Bureau addresses students from across the country before the start of the 2012 National Guard Youth Challenge Gala, Washington, DC on 28 February 2012. (National Guard photo by MSgt Marvin R. Preston)