Air Force Reserve Lt. Gen. James F. Jackson, the chief of the Air Force Reserve, testifies Oct. 24 to the National Commission of the Structure of the Air Force in Arlington, Va. The National Commission of the Structure of the Air Force was established by Congress this year to comprehensively study the U.S. Air Force and it three components - active, reserve and Air National Guard - and determine how the Air Force's structure should be modified to best fill current and future mission requirements, including homeland defense, with available resources. (U.S. Air Force photo/Master Sgt Marvin R. Preston)